CN101719773B - Signal processing method and system for ultra wideband zero-intermediate frequency receiver - Google Patents
Signal processing method and system for ultra wideband zero-intermediate frequency receiver Download PDFInfo
- Publication number
- CN101719773B CN101719773B CN 200910243875 CN200910243875A CN101719773B CN 101719773 B CN101719773 B CN 101719773B CN 200910243875 CN200910243875 CN 200910243875 CN 200910243875 A CN200910243875 A CN 200910243875A CN 101719773 B CN101719773 B CN 101719773B
- Authority
- CN
- China
- Prior art keywords
- coding
- signal
- code word
- receiver
- preliminary treatment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000003672 processing method Methods 0.000 title claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 12
- 238000012545 processing Methods 0.000 claims description 5
- 238000001228 spectrum Methods 0.000 abstract description 16
- 238000005265 energy consumption Methods 0.000 abstract 1
- 238000004891 communication Methods 0.000 description 14
- 230000005540 biological transmission Effects 0.000 description 11
- 238000001914 filtration Methods 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 7
- 230000008859 change Effects 0.000 description 4
- 230000008054 signal transmission Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000012467 final product Substances 0.000 description 3
- 238000013507 mapping Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 108020004705 Codon Proteins 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000009365 direct transmission Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Landscapes
- Dc Digital Transmission (AREA)
Abstract
The invention provides a signal processing method and system for an ultra wideband zero-intermediate frequency receiver. The method comprises the following steps of: encoding a signal sent by a signal source, wherein the quantity difference between codes 1 and 0 is not greater than 2 during encoding; performing emission pretreatment on the signal, and sending the signal to the receiver; performing receiving pretreatment on the signal, and decoding the signal after receiving pretreatment. The invention eliminates a zero-power spectrum component of a single carrier wave, avoids the cross-symbol interference caused by a high-pass wave filter, and also ensures that the energy consumption of an emitting end is not increased.
Description
Technical field
The present invention relates to ultra-wideband communication technical field, particularly relate to a kind of signal processing method for ultra wideband zero-intermediate frequency receiver and system.
Background technology
Super-broadband tech is a kind of novel radio technology of at present the most competitive short distance high spatial capacity (traffic/square metre), be expected at WLAN (wireless local area network) (WLAN), wireless personal local area network (WPAN),, wireless sensor network, intelligent multimedia home network, safety and a lot of fields such as military all have broad application prospects.Radio ultra wide band system can realize that frequency band shares, and research thinks, this technology can be worked simultaneously with other narrowband systems.Ultra-wideband Communication Technology is a kind of unconventional, novel Radio Transmission Technology, its usually adopt extremely wide frequency spectrum (relative bandwidth greater than 20% or absolute bandwidth greater than 500MHz) transmission information.
The general two conversion regimes of wireless communication receiver system's employing intermediate frequency, it has good image cancellation performance.Yet superheterodyne tuner wherein needs complicated two-stage type mixing: first signal is down to high intermediate frequency from radio-frequency range, then by second level mixting circuit, signal is down to base band.
The receiver of zero intermediate frequency mode only needs a mixing just radiofrequency signal directly can be down to base band from radio-frequency range.This receiver does not have the problem that mirror image disturbs.But, ultra wideband zero-intermediate frequency receiver also has its shortcoming: because the 1/f noise of zero intermediate frequency down-conversion mode can overlap with the complex baseband signal frequency spectrum, the closer to signal baseband zero-frequency (direct current) point, this noise is just stronger, so the 1/f mixer noiser can cause the signal to noise ratio of the baseband signal of receiver to decline to a great extent.Therefore this problem is especially serious for the integrated circuit (IC) design of CMOS technique, need to adopt high pass filter to come this 1/f frequency mixer low-frequency noise of filtering in the base-band analog signal loop.But do like this wave form varies that can cause signal and produce across symbol-interference (ISI, inter-symbol interference), thereby making the bit error rate performance decrease of signal transmission.
Mb-ofdm (MB-OFDM, Multiband Orthogonal FrequencyDivision Multiplexing) technology adopts the OFDM technology, the mode of leaving a blank by subcarrier is in order to solve the ISI that produces because add high pass filter in signal path.(mode of (IFFT, Inverse Fast Fourier Transformer) can be divided into some very narrow parallel subcarriers to broadband signal and communicate by adopting inverse fast fourier transform at transmitting terminal due to OFDM.Be not used as signal transmission therefore can just leave a blank out at the frequency domain of transmitting terminal to the subcarrier of those low frequencies, will can not produce any impact to its low frequency baseband signal (empty invalid subcarrier) like this when adopting high pass filter.
The shortcoming of MB-OFDM ultra broadband standard is that the hardware configuration of OFDM is complicated, consumes energy also high.Be very a plurality of subcarriers (being made as n) because signal isolates, when the symbol of all sub-carrier signals was all identical, the amplitude of total signal be just original n times.With regard to having the amplitude stack problem of signal, be referred to as peak-to-average power ratio problem (PAPR, Peak-to-Average Power Ratio) like this.The PAPR problem makes the emission power consumption increase by ten several times.
In a word, need the urgent technical problem that solves of those skilled in the art to be exactly: how can solve the ISI interference problem of ultra wideband zero-intermediate frequency receiver system, guarantee not increase simultaneously the power consumption of transmitting terminal.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of baseband coding method and system for ultra wideband zero-intermediate frequency receiver, by eliminating the power spectrum component at zero point of single carrier, avoid the ISI that high pass filter causes to disturb, guarantee not increase simultaneously the power consumption of transmitting terminal.
In order to address the above problem, the invention discloses a kind of signal processing method for ultra wideband zero-intermediate frequency receiver, comprising:
The signal that information source is sent is encoded; The described difference that is encoded to the number of " 1 " and " 0 " in code word is not more than 2 coding, and described coding comprises the 5B6B coding;
Signal is launched preliminary treatment and sent it to receiver;
Signal is received preliminary treatment and the pretreated signal of decoding reception;
Wherein, described emission preliminary treatment comprises: with signal by baseband-converted to radio band;
Described reception preliminary treatment comprises: signal is transformed into base band by radio band;
Described reception preliminary treatment also comprises: filter 1/f noise by high pass filter;
When carrying out the 5B6B coding,
The control that negative mode positive according to code word switches is encoded to the signal that information source is sent;
Wherein, described holotype comprises: the coding that comprises four " 1 " and two " 0 " in code word; Described negative mode comprises: the coding that comprises four " 0 " and two " 1 " in code word; Comprise the balanced code that is of three " 1 " and three " 0 " in code word, its pattern is identical with the pattern of its last code word.
In a preferred embodiment of the invention, described coding also comprises: 8B10B coding or 10B12B coding.
Further, when carrying out the 8B10B coding, described code word comprises: the code word that the number of 252 " 1 " equates with the number of " 0 "; And the difference of the number of the number of 8 " 1 " and " 0 " is 2 code word.
In addition, the invention also discloses a kind of signal processing system for ultra wideband zero-intermediate frequency receiver, comprising:
Transmitter is used for signal is launched preliminary treatment, and signal is sent to receiver by baseband-converted after radio band;
Receiver, the signal that is used for receiving is transformed into base band by radio band and receives preliminary treatment, and filters 1/f noise by high pass filter;
Wherein, described transmitter comprises:
Coding unit, the signal that is used for before the emission preliminary treatment, information source being sent is encoded; The described difference that is encoded to the number of " 1 " and " 0 " in code word is not more than 2 coding, and described coding comprises the 5B6B coding;
When described coding unit carries out the 5B6B coding,
The control that negative mode positive according to code word switches is encoded to the signal that information source is sent;
Wherein, described holotype comprises: the coding that comprises four " 1 " and two " 0 " in code word; Described negative mode comprises: the coding that comprises four " 0 " and two " 1 " in code word; Comprise the balanced code that is of three " 1 " and three " 0 " in code word, its pattern is identical with the pattern of its last code word;
Described receiver comprises:
Decoding unit is used for decoding and receives pretreated signal.
Preferably, described coding also comprises: 8B10B coding or 10B12B coding.
Further, when described coding unit carried out the 8B10B coding, described code word comprised: the code word that the number of 252 " 1 " equates with the number of " 0 "; And the difference of the number of the number of 8 " 1 " and " 0 " is 2 code word.
Compared with prior art, the present invention has the following advantages:
The present invention makes the probability that occurs " 1 " and " 0 " in code word reach balance by signal transmission being carried out 5B6B coding or 8B10B coding, can guarantee to comprise less low frequency component in the frequency spectrum of transmission pattern, does not contain the flip-flop amount.On signal receiver, disturb by a high-pass filtering filtering 1/f noise, do not have power spectrum component near the zero point of frequency domain due to signal, so can not cause the additional ISI of receiving terminal to disturb, guaranteed the bit error rate performance of signal transmission.
In addition, than the OFDM mode, there is no the problem of peak-to-average force ratio, significantly reduced the radio frequency part power consumption of radio communication, need not larger back-off, reduced power consumption, be particularly suitable for battery powered hand-held super broad band radio communication equipment.
Description of drawings
Fig. 1 is the flow chart of a kind of signal processing method embodiment for ultra wideband zero-intermediate frequency receiver of invention;
Fig. 2 is that the positive negative mode of 5B6B coding in the inventive method embodiment switches schematic diagram;
Fig. 3 is the structure chart of a kind of signal processing system embodiment for ultra wideband zero-intermediate frequency receiver of invention.
Embodiment
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, the present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
With reference to Fig. 1, show the flow chart of a kind of signal processing method embodiment for ultra wideband zero-intermediate frequency receiver of the present invention, comprising:
Signal in the embodiment of the present invention is processed and mainly is used in the situation that ultra wideband transmissions or communication channel bandwidth surpass 10MHz.At first, need to encode to the signal that will send, described signal is the baseband signal that information source is sent, and the baseband signal coded system is the comparatively balanced coding of number of " 1 " and " 0 ", and the difference of generally choosing the number of " 1 " and " 0 " in code word is not more than 2 coding.
In a preferred embodiment of the invention, described coding comprises: 5B6B coding, 8B10B coding or 10B12B coding.
The present embodiment is encoded to example with 5B6B and is specifically described.5B6B coding as shown in table 1, as to process for being used for the ultra broadband zero intermediate frequency signals.
Table 1
In the 5B6B coding, in signal code stream, every 5 bit symbols are divided into one group, and then this 5 bit code is transformed to 6 bit codes.According to the theory of mathematics permutation and combination as can be known, by 5 and 6 bit codes that " 0 ", " 1 " these two kinds of binary signals form, following arrangement is arranged: the number of permutations of 5 bit codes has 2
5=32 kinds, the number of permutations of 6 bit codes has 2
6=64 kinds.
In 64 kinds of possible output codons, the balance code word that contains three " 1 " and three " 0 " has 20.So-called balanced code refers in a code word, and the number of " 0 " and " 1 " is equal.Obviously, such pattern is conducive to keep the stability of DC component in signal bit stream.
In addition, in non-equilibrium code word, contain have 15 kinds of four " 1 " and two " 0 ", contain have 15 of four " 0 ", two " 1 ", totally 30.If we regard " 1 " to " 0 " as, the addition of 20 kinds of aforementioned balanced codes numeral and be zero, and remaining 12 kinds be numeral and " 2 " and 12 kinds of numerals and be the Codeword Sets of "+2 ".Generally, for non-equilibrium code, only select wherein 12 groups to be used for coding.
Except above-mentioned two kinds of code words, also have 14 groups, the number great disparity of its " 0 " and " 1 " is too large, be unfavorable for stablizing the DC component in code stream, therefore, in code word, the number of " 0 " or " 1 " is 1,5 or 6 o'clock, not signal coding form is to keep the stable of signal bit stream component.In addition, in 64 code words of 5B6B, there are 20 code words not use.Like this, in a single day receiver receives any one in these 20 code words, must be to have occurred error code in transmission, with work, system is carried out Error detection.
The selection principle of code word as can be seen from the above analysis: at first choose 20 balance code words that contain three " 0 " and " 1 " in code word.Select again 24 in 30 non-equilibrium code words that contain four " 0 " or four " 1 ".
Further, when carrying out the 5B6B coding, the control that negative mode positive according to code word switches is encoded to the signal that information source is sent.Wherein, described holotype comprises: the coding that comprises four " 1 " and two " 0 " in code word; Described negative mode comprises: the coding that comprises four " 0 " and two " 1 " in code word.When in code word, the number of " 1 " and " 0 " equates, keep present mode constant, both can be holotype, also can be negative mode simultaneously.
By Fourier transform as can be known:
Wherein, F (Ω) obtains frequency spectrum for signal by discrete Fourier transform; Ω=2 π f/f
sIt is normalized frequency; X[n] be the output valve of discrete source signal (when being encoded to " 1 ", value is+1, and during for " 0 ", value is " 1 ").
As seen F (0) depend on x (n) numeral and, if keep numeral and be 0, the numerical value of F (0) is 0.And the coding thinking of 5B6B is to make numeral and be 0., as long as in transmission pattern, the duration of positive level and negative level equates, just can guarantee not contain flip-flop in the frequency spectrum of transmission pattern, and assurance comprises less low frequency component; Wherein, " 1 " is positive level, and " 0 " is negative level.In the embodiment of the present invention, holotype, negative mode are used alternatingly, thereby the total probability that has kept " 0 " in the letter code stream, " 1 " to occur equates.
After Signal coding, launch preliminary treatment, it comprises: carry out the modulation (digital signal is converted to mode signal) of normal chnnel coding and signal, as single carrier two-phase PSK (BPSK, BinaryPhase Shift Keying) modulation etc.Then carry out the RF up-converter of transmitting terminal, with signal from the baseband-converted to the radio band, in communication, because baseband signal has the very low spectrum component of frequency, consider for anti-interference and raising transfer rate, general direct transmission need to be transformed into the signal that its frequency band is adapted at transmitting in channel to baseband signal, and the part baseband signal changes radiofrequency signal into.Signal is through after the multipath channel of ultra broadband, and the amplification of carrying out radio frequency at receiver receives.
At receiver, adopt zero intermediate frequency down-conversion mode that radiofrequency signal is transformed to baseband signal, need a mixing that radiofrequency signal directly is down to base band from radio-frequency range, realize that zero intermediate frequency receives.In addition, for the filtering 1/f noise, adopted high pass filter to come filtering 1/f low-frequency noise.Because the signal after the coding in the embodiment of the present invention does not have the power spectrum frequency domain component at zero point, so do not eliminated the impact of the high pass filter of 1/f noise, reduced the ISI that causes thus and disturbed, improved the transmission performance of pattern, reduced the error rate.
Further, because this baseband signal is analog signal at this moment, after through analog to digital converter (ADC, Analog to Digital Converter) sampling, become digital signal.Afterwards, carry out conventional channel equalization and the processing of channel-decoding, carry out at last symbol judgement, adjudicate complete binary bit-level symbol " 1 " or " 0 " of obtaining.At this moment, do corresponding 5B6B decoding or 8B10B decoding according to the coding of transmitting terminal, perhaps, decode accordingly by the coding of other form.In the embodiment of the present invention, the data reduction of using the mode of binary coding mapping to carry out transmitting terminal according to table 1 obtains the source signal that transmitting terminal sends.
Need to prove, in embodiments of the present invention, during the ultra broadband zero intermediate frequency signals is processed, traditional filtering manufacturing process still can be implemented, so that reduce the frequency domain side lobe of signal, lowers the phase mutual interference to signal in adjacent channel.Therefore can limit the Nyquist without ISI (Nyquist) filtering of band to be shaped at receiving terminal and transmitting terminal, this sample baseband coding mode will be seldom to the change of traditional communication system, is conducive to the design of communication system.
As shown in Figure 2, the positive negative mode for 5B6B coding in the embodiment of the present invention switches schematic diagram.In the baseband coding of making a start, adopt the method for the state machine transitions switching of following positive negative mode to switch positive and negative pattern code character, keep positive and negative numeral and equate with the data that guarantee transmitting terminal.The frequency domain of transmit signal power spectrum will by zero setting, guarantee to disturb without ISI after the high pass filter of receiving terminal zero point like this.
Below, the embodiment that provides one group of 5B6B coding is specifically described,
By the baseband signal of sending be:
01010?01001?01011?01101?01111?01110......
According to shown in table 1, its corresponding sequence number is 10,9,11,13,15,14
Accordingly, carrying out the rear signal bit stream of 5B6B coding is:
010111?010101?011000?011110?110100?010001......
Its corresponding pattern switches to:
Holotype, holotype, negative mode, holotype, holotype, negative mode.
Below, above-mentioned coding is specifically described:
Initial 5B code be " 01010 ", and embodiment of the present invention regulation is initially holotype, carries out numeral and is the coding of "+2 ", and the 6B code is " 010111 ";
Second 5B code is " 01001 ", and its positive and negative pattern-coding is identical, for " 010101 " (numeral and be " 0 "), still is in holotype, at this moment, and total digital of the first two code word and be "+2 ";
The 3rd 5B code is " 01011 ", switches under negative mode, is encoded to " 011000 " (numeral and for " 2 "), at this moment, and the numeral that first three code word is total and revert to zero;
The 4th 5B code is " 01101 ", switches under holotype, is encoded to " 011110 " (numeral and for "+2 "), at this moment, and the numeral that front four code words are total and be "+2 ";
The 5th 5B code is " 01111 ", and its positive and negative pattern-coding is identical, for " 110100 " (numeral and be " 0 "), still is in holotype, at this moment, and total digital of the first five code word and be "+2 ";
The 6th 5B code is " 01110 ", switches under negative mode, is encoded to " 010001 " (numeral and for " 2 "), at this moment, and the numeral that the first six code word is total and revert to zero.
Coding afterwards by the continuous switching between positive negative mode, guarantees that the numeral of Signal coding code word and positive number, negative equate by that analogy, and the frequency domain of transmit signal power spectrum zero point will be by zero setting like this.
Further, when the 5B6B of receiver decoding, due to the code word of positive negative mode and unique mapping of original source binary data, can not do the judgement of holotype and negative mode, the 6B code word of positive negative mode all completely corresponds to corresponding unique original source binary data.
Namely be decoded as accordingly 01,001 01,010 01,011 01,101 01110.
The balanced coding method (as 10B12B etc.) that is appreciated that other " 1 " and " 0 " is similar with 5B6B, only need to be according to source signal, and keep the number of " 1 " in each code word after coding to equate with the number of " 0 ".Take 8B10B as example, its code word that can select is " 1010101010 ", " 1101010100 ", " 1100101010 ", " 1011010100 ", " 1010110100 ", " 1010110010 " etc., and in code word, the number of the number of " 1 ", " 0 " is that the coding form of 5 has C
5 10Kind, namely 252 kinds, provide no longer one by one herein.Need to prove, because the form of 8B coding has 256 kinds, shine upon mutually in order to make 10B coding and 8B coding, the difference that also needs to choose the number of " 1 " and " 0 " is the code word that 8 code words of 2 form 4 groups of positive negative modes, and is corresponding with 4 code words of 8B.In coding, there are enough coding forms available, only need to guarantee that 1 and 0 number equates to get final product.General, in order to guarantee not contain DC component, usually avoid occurring long " 1 " and long connect " 0 " of connecting when coding as far as possible.
This pattern of the 5B6B that adopts by the above embodiment of the present invention (or 8B10 etc.) removes the component of signal zero power spectrum, can conveniently be used for the 1/f noise filtering of ultra broadband zero intermediate frequency mode.After having used high communication number filter filtering 1/f noise, the power spectrum envelope of signal does not change, and produces so cause disturbing without ISI.This makes the single-carrier modulated of low PAPR be applied in the ultra broadband zero intermediate frequency system becomes possibility.Can greatly improve the power efficiency of super broad band radio communication system and the problem of complexity.In addition, than the OFDM mode, significantly reduce the radio frequency part power consumption of radio communication, need not the back-off of 10dB, reduced power consumption.
At transmitting terminal, before the coding of 5B6B (or 8B10 etc.) is placed in Channel Coding and Modulation, at receiving terminal, after the coding of 5B6B (or 8B10 etc.) is placed in the symbol judgement of channel-decoding, therefore the change to wireless communication system is very little, can be conveniently used in super broad band radio communication system.
Show the structure chart of a kind of signal processing system embodiment for ultra wideband zero-intermediate frequency receiver of the present invention with reference to Fig. 3, comprising:
Wherein, described transmitter 31 comprises:
Described receiver 32 comprises:
Decoding unit 321 is used for decoding and receives pretreated signal.
In a preferred embodiment of the invention, described coding comprises: 5B6B coding, 8B10B coding or 10B12B coding.
Preferably, when described coding unit carried out the 5B6B coding, the control that negative mode positive according to code word switches was encoded to the signal that information source is sent; Wherein, described holotype comprises: the coding that comprises four " 1 " and two " 0 " in code word; Described negative mode comprises: comprise the coding of four " 0 " and two " 1 " in code word, comprise the balanced code that is of three " 1 " and three " 0 " in code word, its pattern is identical with the pattern of its last code word.
Preferably, when described coding unit carried out the 8B10B coding, described code word comprised:
The code word that the number of 252 " 1 " equates with the number of " 0 "; And the difference of the number of the number of 8 " 1 " and " 0 " is 2 code word.
Coding unit by the embodiment of the present invention, balanced ratio by " 1 " and " 0 " code, make the duration of positive level and negative level in transmission pattern equate, can guarantee not contain flip-flop in the frequency spectrum of transmission pattern, and comprise less low frequency component.
Further, filter 1/f noise by high pass filter on receiver.Because the signal after the coding in the embodiment of the present invention does not have the power spectrum frequency domain component at zero point, so when adopting high pass filter to eliminate 1/f noise, the wave form varies of its signal is less, has reduced the ISI that causes thus and disturbed, improved the transmission performance of pattern.In addition, the decoding unit of receiver is done corresponding 5B6B decoding, 8B10B decoding or other decodings according to the coding of transmitter, reduces according to the mode of binary coding mapping and obtains the source signal that transmitter sends.
Each embodiment in this specification all adopts the mode of going forward one by one to describe, and what each embodiment stressed is and the difference of other embodiment that between each embodiment, identical similar part is mutually referring to getting final product.For system embodiment, because it is substantially similar to embodiment of the method, so description is fairly simple, relevant part gets final product referring to the part explanation of embodiment of the method.
Above to a kind of signal processing method and system for ultra wideband zero-intermediate frequency receiver provided by the present invention, be described in detail, used specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (6)
1. a signal processing method that is used for ultra wideband zero-intermediate frequency receiver, is characterized in that, comprising:
The signal that information source is sent is encoded; The described difference that is encoded to the number of " 1 " and " 0 " in code word is not more than 2 coding, and described coding comprises the 5B6B coding;
Signal is launched preliminary treatment and sent it to receiver;
Signal is received preliminary treatment and the pretreated signal of decoding reception;
Wherein, described emission preliminary treatment comprises: with signal by baseband-converted to radio band;
Described reception preliminary treatment comprises: signal is transformed into base band by radio band;
Described reception preliminary treatment also comprises: filter 1/f noise by high pass filter;
When carrying out the 5B6B coding,
The control that negative mode positive according to code word switches is encoded to the signal that information source is sent;
Wherein, described holotype comprises: the coding that comprises four " 1 " and two " 0 " in code word; Described negative mode comprises: the coding that comprises four " 0 " and two " 1 " in code word; Comprise the balanced code that is of three " 1 " and three " 0 " in code word, its pattern is identical with the pattern of its last code word.
2. the method for claim 1, is characterized in that,
Described coding also comprises: 8B10B coding or 10B12B coding.
3. method as claimed in claim 2, is characterized in that, when carrying out the 8B10B coding, described code word comprises:
The code word that the number of 252 " 1 " equates with the number of " 0 ";
And the difference of the number of the number of 8 " 1 " and " 0 " is 2 code word.
4. a signal processing system that is used for ultra wideband zero-intermediate frequency receiver, is characterized in that, comprising:
Transmitter is used for signal is launched preliminary treatment, and signal is sent to receiver by baseband-converted after radio band;
Receiver, the signal that is used for receiving is transformed into base band by radio band and receives preliminary treatment, and filters 1/f noise by high pass filter;
Wherein, described transmitter comprises:
Coding unit, the signal that is used for before the emission preliminary treatment, information source being sent is encoded; The described difference that is encoded to the number of " 1 " and " 0 " in code word is not more than 2 coding, and described coding comprises the 5B6B coding;
When described coding unit carries out the 5B6B coding,
The control that negative mode positive according to code word switches is encoded to the signal that information source is sent;
Wherein, described holotype comprises: the coding that comprises four " 1 " and two " 0 " in code word; Described negative mode comprises: the coding that comprises four " 0 " and two " 1 " in code word; Comprise the balanced code that is of three " 1 " and three " 0 " in code word, its pattern is identical with the pattern of its last code word;
Described receiver comprises:
Decoding unit is used for decoding and receives pretreated signal.
5. system as claimed in claim 4, is characterized in that,
Described coding also comprises: 8B10B coding or 10B12B coding.
6. system as claimed in claim 5, is characterized in that, when described coding unit carried out the 8B10B coding, described code word comprised:
The code word that the number of 252 " 1 " equates with the number of " 0 ";
And the difference of the number of the number of 8 " 1 " and " 0 " is 2 code word.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910243875 CN101719773B (en) | 2009-12-24 | 2009-12-24 | Signal processing method and system for ultra wideband zero-intermediate frequency receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910243875 CN101719773B (en) | 2009-12-24 | 2009-12-24 | Signal processing method and system for ultra wideband zero-intermediate frequency receiver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101719773A CN101719773A (en) | 2010-06-02 |
| CN101719773B true CN101719773B (en) | 2013-05-22 |
Family
ID=42434298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910243875 Expired - Fee Related CN101719773B (en) | 2009-12-24 | 2009-12-24 | Signal processing method and system for ultra wideband zero-intermediate frequency receiver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101719773B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102891699B (en) * | 2012-10-22 | 2016-09-28 | 上海集成电路研发中心有限公司 | A kind of ultra-wide band radio frequency transceiver |
| CN107493156B (en) * | 2016-11-24 | 2020-04-10 | 天地融科技股份有限公司 | Transmission parameter acquisition method and terminal |
| CN109818635B (en) * | 2019-01-30 | 2021-03-09 | 北京智芯微电子科技有限公司 | Signal transmission method based on zero intermediate frequency receiver |
| CN114928409B (en) * | 2022-07-18 | 2022-10-18 | 苏州旭创科技有限公司 | Method, device and system for processing signal |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1509557A (en) * | 2002-02-15 | 2004-06-30 | ���µ�����ҵ��ʽ���� | Transmission apparatus and transmission method |
| CN1767396A (en) * | 2004-10-29 | 2006-05-03 | 阿尔特拉公司 | Next generation 8B10B architecture |
| CN101605112A (en) * | 2009-07-15 | 2009-12-16 | 华南理工大学 | A kind of ultra wide band chaotic communication method |
-
2009
- 2009-12-24 CN CN 200910243875 patent/CN101719773B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1509557A (en) * | 2002-02-15 | 2004-06-30 | ���µ�����ҵ��ʽ���� | Transmission apparatus and transmission method |
| CN1767396A (en) * | 2004-10-29 | 2006-05-03 | 阿尔特拉公司 | Next generation 8B10B architecture |
| CN101605112A (en) * | 2009-07-15 | 2009-12-16 | 华南理工大学 | A kind of ultra wide band chaotic communication method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101719773A (en) | 2010-06-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9281861B2 (en) | Low power ultra wideband transceivers | |
| CN102007747B (en) | An improved dual carrier modulation precoding | |
| KR20070007179A (en) | Versatile system for dual carrier transformation in orthogonal frequency division multiplexing | |
| JP2007507967A (en) | Multi-carrier OFDM UWB communication system | |
| JP2007507967A6 (en) | Multi-carrier OFDM UWB communication system | |
| CN102025669B (en) | Short-wave data transmission method based on dual multisystem quasi-orthogonal spread-spectrum composite phase modulation | |
| CN101164240A (en) | Ultrawideband architecture | |
| CN101340207A (en) | Ultra-wideband receiving method based on sub-band parallel sampling | |
| CN101719773B (en) | Signal processing method and system for ultra wideband zero-intermediate frequency receiver | |
| JP4633054B2 (en) | Method and transmitter for communicating ultra-wideband signals using orthogonal frequency division multiplexing modulation | |
| KR100830588B1 (en) | Uwb receiver scaling the clock frequency according to data rate and receiving method thereof | |
| CN102387105B (en) | Modulating method and device | |
| US8687724B2 (en) | Method for accelerating the precoding and pre-decoding of symbols in OFDM systems | |
| CN104243386B (en) | Multi-carrier communications systems additional channel information transferring method | |
| CN103297189A (en) | Self-adaptive frequency domain interleaving method for OFDM system rotation modulating | |
| CN103036828B (en) | Multi-carrier frequency hopping communication system based on on-off keying (OOK) modulation | |
| CN101425818B (en) | Method and system for ultra-wideband communication frequency domain equalization | |
| US7593478B2 (en) | Low peak to average ratio search algorithm | |
| CN105007253A (en) | SC-FDM-based millimeter-wave wireless point-to-point trunk line transmission system | |
| WO2012024824A1 (en) | Method and system for the 5th generation wideband wireless communication based on digital signal encoding | |
| CN102185821B (en) | Cognitive-radio-based anti-interference multi-carrier broadband communication system | |
| CN204859219U (en) | Point -to -point trunk transmission system that millimeter wave is wireless based on SC -FDM | |
| Elsayed et al. | Higher order modulation scheme for the 1-bit ADC MIMO-constant envelope modulation | |
| Manimegalai et al. | Efficacy of 16-APSK modulation for Multiband Pulsed-OFDM UWB-communication systems | |
| CN103346993A (en) | Wide-interval carrier wave mapping method used for multi-carrier-wave frequency-shift keying system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130522 |