CN103580774A - Control signling transmission method and control signling transmission device - Google Patents

Abstract

The invention provides a control signling transmission method and a control signling transmission device. The method comprises the steps of block-coding a signaling bit, modulating the block-coded signaling bit, repeating and sorting modulated symbols according to specified rules and transmitting the repeated and sorted symbols. With the control signling transmission method and the control signling transmission device, better signal uniformity is achieved, and the influence of abnormal direct-current jitter of a transmitting end due to poor control signaling uniformity when a digital signal is transmitted to an analog circuit can be minimized.

Description

A kind of method and device of control signal transmission

Technical field

The present invention relates generally to microwave communication transmission field, particularly relates to a kind of method and device of control signal transmission.

Background technology

Fig. 1 has described the system diagram of the classical zero intermediate frequency scheme of making a start in communication and transmission system.Generally, this scheme can the output signal in analog circuit partly be sneaked into direct current.The reason that produces direct current is mainly analog frequency mixing process local oscillator leakage, through test of many times, finds, sends into the randomness of baseband digital signal of DAC (digital to analog converter) and the variation that uniformity can affect this place's direct current.Signal more evenly, more random, direct current is more constant.Therefore, need to guarantee to send into randomness and the uniformity of analog circuit signal.

In Fig. 1, send into the baseband digital signal before DAC, its corresponding physical frame formats as shown in Figure 2.Wherein, preamble field is used for carrying out synchronously, signaling field transfer control and system indication information, and data field is business to be passed, pilot field is used for training.

The transmission of tradition control signal comprises process below:

The 1st step: signaling bit is carried out to block code coding.

The 2nd step: the bit after block code coding is carried out to repeated encoding.

The 3rd step: the data after repeated encoding are carried out to scrambling.

The 4th step: the data after scrambling are modulated.

The 5th step: the symbol after modulation is transmitted.

General control signaling is n bit information, and n is a less value (classical value is between 8～20) conventionally.Bit after k time retransmits is k*n, and k selects 3～5 times conventionally.Therefore because k*n is smaller, the data of 3rd step of traditional control signal in transmitting after to repeated encoding are carried out the difficult point that scrambling is signalling.Be difficult to choose one group of scrambler and make 2 ^n*ksymbol after group data scrambling is modulated again all has evenly high under various conditions.After this scrambling modulation, symbol uniformity is not high, can show the direct current shake of making a start in practical communication and transmitting procedure.For macro base station system, because order of modulation is lower, this magnitude is made a start direct current shake may be to systematic influence little; But for wired or invalid transmission system, owing to adopting high order modulation, the direct current shake meeting of making a start of this magnitude has larger impact to system.

In order to eliminate the impact of the direct current shake of making a start causing due to uniformity, need to be with many groups scrambler to carrying out scrambling.First, do like this waste resource; Secondly, owing to carrying out scrambling with many group scramblers, it is that transmitting terminal also needs to notify receiving terminal selected for which group scrambler, the complexity that takies overhead and control procedure is become.

Summary of the invention

The technical problem to be solved in the present invention is to provide a kind of method and device of control signal transmission, so that signal has better uniformity.

In order to solve the problems of the technologies described above, the invention provides a kind of method of control signal transmission, comprising:

Signaling bit is carried out to block code coding;

Bit after block code coding is modulated;

Symbol after modulation is carried out carrying out repetition and sequence by specified rule;

Symbol after repetition and sequence is transmitted.

Further, said method also has feature below: described symbol after modulation is carried out carrying out twice repetition and sequence comprises by specified rule:

To y ₁(i) carry out obtaining y after antithesis repetition ₂(i), y ₁(i) be the symbol after modulation, wherein, i=1,2 ..., m/s, m is the number of bits after described block encoding, s is order of modulation;

According to following z sequence rules, the symbol after modulating is sorted:

$z(2*\frac{m}{s}-1)=y_1\left(\frac{m}{s}\right),$

$z(2*\frac{m}{s})=y_2\left(\frac{m}{s}\right).$

Further, said method also has feature below: described to modulation after symbol carry out by specified rule carry out 2*k time repetition and sequence comprise:

To y ₁(i) carry out obtaining y after antithesis repetition ₂(i), y ₁(i) be the symbol after modulation, wherein, i=1,2 ..., m/s, m is the number of bits after described block encoding, s is order of modulation;

According to following z sequence rules, the symbol after modulating is sorted:

$z(2*k*\frac{m}{s}-1)=y_1\left(\frac{m}{s}\right),$

$z(2*k*\frac{m}{s})=y_2\left(\frac{m}{s}\right).$

In order to address the above problem, the present invention also provides a kind of device of control signal transmission, comprising:

The first module, for carrying out block code coding to signaling bit;

The second module, for modulating the bit after block code coding;

The 3rd module, carries out carrying out repetition and sequence by specified rule for the symbol to after modulation;

Four module, transmits for the symbol to after repetition and sequence.

Further, said apparatus also has feature below: described the 3rd module comprises:

First module, for to y ₁(i) carry out obtaining y after antithesis repetition ₂(i), y ₁(i) be the symbol after modulation, wherein, i=1,2 ..., m/s, m is the number of bits after described block encoding, s is order of modulation;

Second unit, for the symbol after modulating being sorted according to following z sequence rules:

$z(2*\frac{m}{s}-1)=y_1\left(\frac{m}{s}\right),$

$z(2*\frac{m}{s})=y_2\left(\frac{m}{s}\right).$

Further, said apparatus also has feature below: described the 3rd module comprises:

Unit the 3rd, for to y ₁(i) carry out obtaining y after antithesis repetition ₂(i), y ₁(i) be the symbol after modulation, wherein, i=1,2 ..., m/s, m is the number of bits after described block encoding, s is order of modulation;

Unit the 4th, for the symbol after modulating being sorted according to following z sequence rules:

$z(2*k*\frac{m}{s}-1)=y_1\left(\frac{m}{s}\right),$

$z(2*k*\frac{m}{s})=y_2\left(\frac{m}{s}\right).$

To sum up, the invention provides method and the device of a kind of control signal transmission, so that signal has better uniformity, with will be when digital signal is sent into analog circuit, because the control signal lack of homogeneity direct current that causes making a start is shaken abnormal impact and dropped to minimum.

Accompanying drawing explanation

Fig. 1 is the schematic diagram of the transmission system of making a start of prior art;

Fig. 2 is the schematic diagram of classical transmission system physical frame formats;

Fig. 3 is the flow chart of method of the control signal transmission of the embodiment of the present invention;

Fig. 4 is the schematic diagram that the antithesis of the embodiment of the present invention repeats;

Fig. 5 is the schematic diagram of device of the control signal transmission of the embodiment of the present invention.

Embodiment

For making the object, technical solutions and advantages of the present invention clearer, hereinafter in connection with accompanying drawing, embodiments of the invention are elaborated.It should be noted that, in the situation that not conflicting, the embodiment in the application and the feature in embodiment be combination in any mutually.

Fig. 3 is the flow chart of method of the control signal transmission of the embodiment of the present invention, as shown in Figure 3, comprises step below:

Step 11: signaling bit is carried out to block code coding.

Step 12: the bit after block code coding is modulated.

Step 13: the symbol after modulation is carried out carrying out repetition and sequence by certain rule.

Step 14: the symbol by after certain rule repetition and sequence is transmitted.

The method of the embodiment of the present invention and traditional control signal transmitting procedure are compared, and the benefit obtaining is as follows:

1. the processing of " symbol after modulation being carried out carrying out repetition and sequence by certain rule " through embodiment of the present invention step 13 is processed than " data after repeated encoding being carried out to scrambling " through conventional method the 3rd step, signal has better uniformity, i.e. the present invention can have better performance.

2. providing under the prerequisite of better performance, the embodiment of the present invention has been omitted the processing of scrambling, has saved system resource; Owing to having reduced control, can reduce system power dissipation simultaneously.

3. the gain of conventional method bit-level repeated encoding, the method for the embodiment of the present invention is carried out repetition by the symbol to after modulation, can obtain same gain.That is, the method for the embodiment of the present invention can't be lost the coding gain that conventional method bit-level retransmits.

With two specific embodiments, method of the present invention is described in detail below.

Scheme once or twice repeats to transmit sort method:

The system signaling bit of setting up departments is n position, is m bit, then modulates after block code coding.Symbol after modulation is designated as y ₁(i), i=1 wherein, 2 ..., m/s., s is order of modulation.

Make y ₂(i)=-y ₁(i), y ₂for original modulation symbol y ₁antithesis repeat.

To y ₁(i), y ₂(i) sort, ordering rule is as follows:

z(1)＝y ₁(1)

z(2)＝y ₂(1)

...

$z(2*\frac{m}{s}-1)=y_1\left(\frac{m}{s}\right)$

$z(2*\frac{m}{s})=y_2\left(\frac{m}{s}\right)$

The signal of symbol sebolic addressing z for finally transmitting on link, its uniformity can guarantee that continuous two symbol averages are zero.

Scheme two, repeatedly (as 2*k time) repeat to transmit sort method:

1, n bit signalling is carried out to block code coding, produce m bit, be designated as x (i), i=1 wherein, 2 ..., m.

2, x (i) is modulated, the symbol after modulation is y ₁(i), i=1 wherein, 2 ..., m/s, s is order of modulation.

3, to y ₁(i) carry out 2*k time and repeat, obtain diversity gain:

Make y ₂(i)=-y ₁(i), y ₂for original modulation symbol y ₁antithesis repeat.

Be for the 2*j-1 time that the symbol that will pass is y ₁(i),

Be for the 2*j time that the symbol that will pass is y ₂(i), j=1 wherein, 2 ..., k,

Design like this, 2*j antithesis in constellation point of 2*j-1 and, that is, and about origin symmetry, as shown in Figure 4.

4, the signal after repeating is rearranged:

z(1)＝y ₁(1)

z(2)＝y ₂(1)

...

z(2*k-1)＝y ₁(1)

z(2*k)＝y ₂(1)

...

$z(2*k*\frac{m}{s}-1)=y_1\left(\frac{m}{s}\right)$

$z(2*k*\frac{m}{s})=y_2\left(\frac{m}{s}\right)$

The signal of symbol sebolic addressing z for finally transmitting on link, its uniformity can guarantee that the average of a continuous 2*k signaling symbols is zero, N is random natural number.Thus strict guarantee the uniformity of control signal part signal of signal of analog circuit input.

Fig. 5 is the schematic diagram of device of the control signal transmission of the embodiment of the present invention, and as shown in Figure 5, the device of the present embodiment comprises:

The first module, for carrying out block code coding to signaling bit;

The second module, for modulating the bit after block code coding;

The 3rd module, carries out carrying out repetition and sequence by specified rule for the symbol to after modulation;

Four module, transmits for the symbol to after repetition and sequence.

In a preferred embodiment, described the 3rd module comprises:

First module, for to y ₁(i) carry out obtaining y after antithesis repetition ₂(i), y ₁(i) be the symbol after modulation, wherein, i=1,2 ..., m/s, m is the number of bits after described block encoding, s is order of modulation;

Second unit, for the symbol after modulating being sorted according to following z sequence rules:

$z(2*\frac{m}{s}-1)=y_1\left(\frac{m}{s}\right),$

$z(2*\frac{m}{s})=y_2\left(\frac{m}{s}\right).$

In a preferred embodiment, described the 3rd module comprises:

Unit the 3rd, for to y ₁(i) carry out obtaining y after antithesis repetition ₂(i), y ₁(i) be the symbol after modulation, wherein, i=1,2 ..., m/s, m is the number of bits after described block encoding, s is order of modulation;

Unit the 4th, for the symbol after modulating being sorted according to following z sequence rules:

$z(2*k*\frac{m}{s}-1)=y_1\left(\frac{m}{s}\right),$

$z(2*k*\frac{m}{s})=y_2\left(\frac{m}{s}\right).$

One of ordinary skill in the art will appreciate that all or part of step in said method can come instruction related hardware to complete by program, described program can be stored in computer-readable recording medium, as read-only memory, disk or CD etc.Alternatively, all or part of step of above-described embodiment also can realize with one or more integrated circuits.Correspondingly, each the module/unit in above-described embodiment can adopt the form of hardware to realize, and also can adopt the form of software function module to realize.The present invention is not restricted to the combination of the hardware and software of any particular form.

These are only the preferred embodiments of the present invention; certainly; the present invention also can have other various embodiments; in the situation that not deviating from spirit of the present invention and essence thereof; those of ordinary skill in the art are when making according to the present invention various corresponding changes and distortion, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.

Claims (6)

1. the method that control signal transmits, comprising:

Signaling bit is carried out to block code coding;

Bit after block code coding is modulated;

Symbol after modulation is carried out carrying out repetition and sequence by specified rule;

Symbol after repetition and sequence is transmitted.

2. the method for claim 1, is characterized in that: described symbol after modulation is carried out carrying out twice repetition and sequence comprises by specified rule:

To y ₁(i) carry out obtaining y after antithesis repetition ₂(i), y ₁(i) be the symbol after modulation, wherein, i=1,2 ..., m/s, m is the number of bits after described block encoding, s is order of modulation;

According to following z sequence rules, the symbol after modulating is sorted:

$z(2*\frac{m}{s}-1)=y_1\left(\frac{m}{s}\right),$

$z(2*\frac{m}{s})=y_2\left(\frac{m}{s}\right).$

3. the method for claim 1, is characterized in that: described symbol after modulation is carried out carrying out 2*k repetition and sequence comprises by specified rule:

To y ₁(i) carry out obtaining y after antithesis repetition ₂(i), y ₁(i) be the symbol after modulation, wherein, i=1,2 ..., m/s, m is the number of bits after described block encoding, s is order of modulation;

According to following z sequence rules, the symbol after modulating is sorted:

$z(2*k*\frac{m}{s}-1)=y_1\left(\frac{m}{s}\right),$

$z(2*k*\frac{m}{s})=y_2\left(\frac{m}{s}\right).$

4. the device that control signal transmits, comprising:

The first module, for carrying out block code coding to signaling bit;

The second module, for modulating the bit after block code coding;

The 3rd module, carries out carrying out repetition and sequence by specified rule for the symbol to after modulation;

Four module, transmits for the symbol to after repetition and sequence.

5. device as claimed in claim 4, is characterized in that: described the 3rd module comprises:

First module, for to y ₁(i) carry out obtaining y after antithesis repetition ₂(i), y ₁(i) be the symbol after modulation, wherein, i=1,2 ..., m/s, m is the number of bits after described block encoding, s is order of modulation;

Second unit, for the symbol after modulating being sorted according to following z sequence rules:

$z(2*\frac{m}{s}-1)=y_1\left(\frac{m}{s}\right),$

$z(2*\frac{m}{s})=y_2\left(\frac{m}{s}\right).$

6. device as claimed in claim 4, is characterized in that: described the 3rd module comprises:

Unit the 3rd, for to y ₁(i) carry out obtaining y after antithesis repetition ₂(i), y ₁(i) be the symbol after modulation, wherein, i=1,2 ..., m/s, m is the number of bits after described block encoding, s is order of modulation;

Unit the 4th, for the symbol after modulating being sorted according to following z sequence rules:

$z(2*k*\frac{m}{s}-1)=y_1\left(\frac{m}{s}\right),$

$z(2*k*\frac{m}{s})=y_2\left(\frac{m}{s}\right).$

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