CN1558467A - Household image and sound equipment with wireless transmission function - Google Patents
Household image and sound equipment with wireless transmission function Download PDFInfo
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- CN1558467A CN1558467A CNA2004100151879A CN200410015187A CN1558467A CN 1558467 A CN1558467 A CN 1558467A CN A2004100151879 A CNA2004100151879 A CN A2004100151879A CN 200410015187 A CN200410015187 A CN 200410015187A CN 1558467 A CN1558467 A CN 1558467A
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Abstract
The invention relates to an antenna applied to a household image and sound apparatus having a wireless transmission function, which provides a household image and sound apparatus having the wireless transmission function, comprising an antenna for transmitting and receiving signal, which is an intelligent antenna utilizing a digital signal to process the technology and generate space orienting wave beams, the frequency of which satisfies the requirement of 802.11x. Comparing to a common antenna, the intelligent antenna according to the invention can eliminate the affect of common channel disturbance(CCI), multi address interference and multi path decadent.
Description
[technical field]
The present invention relates to a kind of antenna, relate in particular to the antenna of the home audio-visual devices that is applied to have wireless transmission function.
[background technology]
Home audio-visual devices with wireless transmission function comprise integrated wireless router, network stores and the audio-visual gateway of function of Digital Media conversion, be used to launch or the antenna of received signal and 802.11X (X refers to a, b, g etc.) network interface card, the DMA that communicates by antenna with audio-visual gateway, audio-visual gateway can communicate by 802.11X network interface card and antenna and other audio-visual gateway or DMA.Because the transmitting power and the receiving sensitivity of 802.11x network interface card are limited, adopt general antenna can influence transmission range and quality.On the other hand, the aerial multipath that many frequency spectrums and electric wave are arranged disturbs, and is very big to the transmission influence of data.
[summary of the invention]
Purpose of the present invention is exactly the problem that general antenna transmission distance is limited and antijamming capability is weak that solves in the existing home audio-visual devices, proposes a kind of home audio-visual devices with wireless transmission function, can either grow Distance Transmission, again can be anti-interference preferably.
For achieving the above object, the present invention proposes a kind of home audio-visual devices with wireless transmission function, comprise the antenna that is used to transmit and receive signal, described antenna is the smart antenna that utilizes Digital Signal Processing, produces the spatial orientation wave beam.
Described smart antenna is to utilize component feature space processing mode or beam space processing mode to form the antenna of antenna beam.
The frequency of described smart antenna satisfies the requirement of 802.11x, and supports the reception and the emission of single channel and multi-channel rf signal.
Described smart antenna is multi-beam intelligent antenna or adaptive array smart antenna.
The bay of described adaptive array smart antenna is 4 to 16, and the array element distribution mode is linear pattern, circular ring type or plane, and array element distance is 1/2 wavelength.
Preferably, the bay of described adaptive array smart antenna is 6.
The invention has the beneficial effects as follows: smart antenna using digital signal, produce the spatial orientation wave beam, make antenna main beam aim at the subscriber signal arrival direction, secondary lobe or zero falls into aims at the interference signal arrival direction, reach and fully efficiently utilize subscriber signal, and deletion or inhibition interference signal.Simultaneously because smart antenna adopts Digital Signal Processing identification subscriber signal arrival direction, and at this direction formation antenna main beam.Smart antenna provides different space channels according to the different spaces direction of propagation of subscriber signal, the cable that is equal to signal wire transmission, effectively overcome the influence of disturbing system, smart antenna is compared with common antenna, can eliminate cochannel disturbs (CCI), multiple access to disturb the influence of (MAI) and multipath fading, improve transmission range and quality, smart antenna is compared with common antenna, can transmit farther or receive from the signal in a distant place more.
Feature of the present invention and advantage will be elaborated in conjunction with the accompanying drawings by embodiment.
[description of drawings]
Fig. 1 represents component feature space processing mode schematic diagram of the present invention;
Fig. 2 represents that beam space processing mode of the present invention looks intention.
[embodiment]
Home audio-visual devices with wireless transmission function comprise integrated wireless router, network stores and the audio-visual gateway of function of Digital Media conversion, be used to launch or the antenna of received signal and 802.11X (X refers to a, b, g etc.), the one or more DMA that communicates by antenna with audio-visual gateway.Described antenna is a smart antenna, can support the reception and the emission (or only supporting to receive) of single channel and multi-channel rf signal, and frequency satisfies the requirement of 802.11x.
Smart antenna is divided into two big classes: multi-beam intelligent antenna and adaptive array smart antenna, be called for short multi-beam antenna and adaptive array antenna.General 4～16 bay structures, array element distance 1/2 wavelength of adopting of adaptive array antenna.The array element distribution mode has linear pattern, circular ring type and plane.The adaptive array antenna of this specific embodiment adopts 6 bay structures, not only the economy but also the requirement that can reach the signal transmission and receive.
Smart antenna adopts Digital Signal Processing identification subscriber signal arrival direction, the different spaces direction of propagation according to subscriber signal provides different space channels, form antenna main beam in this direction, be equal to the cable of signal wire transmission, effectively overcome the influence of disturbing system.
Smart antenna adopts digital method that array element received signal weighted is formed antenna beam, makes main beam aim at the subscriber signal direction, and falls into or lower power radiation pattern gain at interference signal direction formation antenna pattern zero, reaches the purpose that suppresses interference.According to the various process that antenna beam forms, realize that the mode of smart antenna is divided into two classes again: component feature space processing mode and beam space processing mode.
1. component feature space processing mode: the component feature space processing mode is adjusted signal amplitude and phase place directly to the weighting of array element received signal branch road, makes antenna outbound course figure main lobe direction aim at the subscriber signal arrival direction.Because be the array element component signals, direct weighting is handled without other in analog-to-digital conversion (ADC) back, so claim the component feature space processing mode again.It receives schematic diagram as shown in Figure 1, having 1 to k road signal is imported by antenna, X1 to Xk is respectively through the signal after the A/D conversion, W1 to Wk is respectively the signal of 1 to k road input signal behind constant converting, then signal is sent into weighted units, Y1 to Yk is directly to the output signal after the weighting of array element received signal branch road.
2. beam space processing mode: be with the difference of component feature space processing mode, signal is after reception of array element assembly and analog-to-digital conversion (ADC), need through respective handling (as rapid fourier change), obtain one group of orthogonal spatial beams, pass through beam selection again, therefrom selected part or all wave beam integrated array outbound course figure as required.It receives schematic diagram as shown in Figure 2.1 ' to k ' road signal be signal by antenna input, X1 ' is respectively the signal that passes through after A/D changes to Xk ', carry out rapid fourier change then, go out one or more signal 1a ' to Maf ' through beam selection again, behind constant converting, export W1 ' to Wk ', then signal is sent into weighted units, Y1 ' is the output signal after the weighting to Yk '.Because subscriber signal is often buried in noise signal and interference signal, be difficult to obtain the optimum weighting of array element received signal.Adopt the beam space processing mode can from multi-beam, select the strongest several wave beams of signal,, can under the prerequisite that satisfies the array received effect, reduce operand like this and reduce system complexity to obtain the signal that conforms to quality requirements.
Claims (6)
1. the home audio-visual devices with wireless transmission function comprises the antenna that is used to transmit and receive signal, it is characterized in that: described antenna is the smart antenna that utilizes Digital Signal Processing, produces the spatial orientation wave beam.
2. a kind of home audio-visual devices with wireless transmission function as claimed in claim 1 is characterized in that: described smart antenna is to utilize component feature space processing mode or beam space processing mode to form the antenna of antenna beam.
3. a kind of home audio-visual devices with wireless transmission function as claimed in claim 1 or 2 is characterized in that: the frequency of described smart antenna satisfies the requirement of 802.11x, and supports the reception and the emission of single channel and multi-channel rf signal.
4. a kind of home audio-visual devices with wireless transmission function as claimed in claim 3 is characterized in that: described smart antenna is multi-beam intelligent antenna or adaptive array smart antenna.
5. a kind of home audio-visual devices as claimed in claim 4 with wireless transmission function, it is characterized in that: the bay of described adaptive array smart antenna is 4 to 16, the array element distribution mode is linear pattern, circular ring type or plane, and array element distance is 1/2 wavelength.
6. a kind of home audio-visual devices with wireless transmission function as claimed in claim 5 is characterized in that: the bay of described adaptive array smart antenna is 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2004100151879A CN1558467A (en) | 2004-01-17 | 2004-01-17 | Household image and sound equipment with wireless transmission function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2004100151879A CN1558467A (en) | 2004-01-17 | 2004-01-17 | Household image and sound equipment with wireless transmission function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1558467A true CN1558467A (en) | 2004-12-29 |
Family
ID=34351352
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2004100151879A Pending CN1558467A (en) | 2004-01-17 | 2004-01-17 | Household image and sound equipment with wireless transmission function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1558467A (en) |
-
2004
- 2004-01-17 CN CNA2004100151879A patent/CN1558467A/en active Pending
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