The apparatus and method eliminate mutual interference code in the communication system, multiple access, code-division multiplexing (mdcrc)

 

The invention relates to the field of radio and can be used in communication systems MDCRC that uses both orthogonal and quasiorthogonal codes. In the invention according to one variation evaluation unit of the channel returns the channel estimation pilot signal, the extended orthogonal code by compression. The receiver quasiorthogonal channel receives the channel signal, advanced quasiorthogonal code, compresses channel signal, demodulates the compressed channel signal using the value of the channel estimation and generates an output signal. The evaluation unit mutual interference estimates the value of the interference signal, the pilot channel with a channel signal by obtaining correlation values between orthogonal and quasiorthogonal codes. The mutual interference suppressor removes the estimated interference from the output signal of the receiver quasiorthogonal channel. The technical result - the reduction of mutual interference between orthogonal and quasiorthogonal codes. 6 C. and 7 C.p. f-crystals, 6 ill., table 1.

Description text in facsimile form (see graphic part)

Claims

1. A receiver that simultaneously use what OTDELENIE channels), characterized in that it contains a block of channel estimation to obtain the value of the channel estimation signal, the pilot channel, the extended orthogonal code, through compression, the receiver quasiorthogonal channel for receiving a channel signal, the extended quasiorthogonal code, compression of the received channel signal, demodulation of the compressed channel signal by using the channel estimation signal, the pilot channel and the delivery of the output signal, the evaluation unit mutual interference to estimate the value of mutual interference in the signal of the pilot channel with a channel signal, the advanced quasiorthogonal code, by multiplying the values of the channel estimation signal, the pilot channel on the correlation value between the orthogonal code, the corresponding pilot channel, and quasiorthogonal code, corresponding to quasiorthogonal signal and block the suppression of mutual interference removal estimated values of the mutual interference of the output signal of the receiver quasiorthogonal channel.

2. The receiver under item 1, characterized in that the evaluation unit mutual interference contains a unit for production of complex-conjugate values to calculate the complex-conjugate values of the output signal of block channel estimation and Omnitel is giving correlation to estimate the value of mutual interference, the pilot-channel quasiorthogonal channel.

3. The receiver under item 1, characterized in that the evaluation unit mutual interference includes a unit for obtaining a square of the output signal of the evaluation unit of the channel and the mixer to estimate the value of mutual interference, the pilot-channel quasiorthogonal channel by multiplying correlation values on the value of the output signal of the receiving unit squares to estimate the value of mutual interference, the pilot-channel quasiorthogonal channel.

4. The receiver under item 1, characterized in that the correlation value is calculated as followswhere i is the Walsh code used for the pilot channel; j - core orthogonal code used for the formation of quasiorthogonal code; m - mask quasiorthogonal code; L is the length of the orthogonal code; W Walsh code; Q - quasiorthogonal code.

5. The receiver, which uses orthogonal codes and quasiorthogonal codes in the communication system MDCRC, characterized in that it contains a block of pseudo-random (PS) ratio for SS compression ratio of a received signal; block channel estimation for compression signal, the pilot channel, the extended orthogonal code with the possibility of the formation of values of the channel estimation, the receiver quasiorthogonal channel to compress PS-compressed signija PS compressed signal into a signal of a fast Hadamard transform, determine whether the noise component based on the value of the converted signal, multiplying a certain value on the correlation value between quasiorthogonal code and the corresponding orthogonal code and the multiplication of the received works on complex-conjugate value of a channel estimation to estimate the interference channel using orthogonal code channel using quasiorthogonal code block suppression of mutual interference removal estimated values of the mutual interference of the output signal of the receiver of the quasi-orthogonal channel.

6. The receiver under item 5, characterized in that the evaluation unit mutual interference contains a block of fast Hadamard transform to convert PS-compressed signal into a signal of a fast Hadamard transform, block a decision made with the possibility of comparing the output signal of the block fast Hadamard transform with a predetermined value and delete characters quasiorthogonal code that are not used in accordance with the result of the comparison, the operation unit for multiplying the vector of the output signal of block a decision on the vector of correlation values and a mixer for multiplying the output signal of the operational b is thanaleng code quasiorthogonal channel.

7. The receiver under item 6, characterized in that the block suppression of mutual interference contains an adder to remove the output signal of the mixer of the receiver quasiorthogonal channel.

8. The receiver, which uses orthogonal codes and quasiorthogonal codes in the communication system MDCRC, characterized in that it contains a unit substation compression for PS-compression of the received signal, the evaluation unit of the channel to compress the signal of the pilot channel, the enhanced orthogonal codes, with the possibility of the formation of values of the channel estimation, the receiver of an orthogonal channel to compress PS-compressed signal by the orthogonal code, the evaluation unit mutual interference is made with the possibility of as many masks quasiorthogonal code corresponding to the basic orthogonal code, with the ability to convert PS compressed signal in the signal, the transformed block of fast Hadamard transform, determining the noise component based on the value of the converted signal, with the possibility of multiplying a certain value on the correlation value between the orthogonal code and the corresponding quasiorthogonal code and multiplication of the received works on complex sprage tsuushin orthogonal code and block the suppression of mutual interference removal estimated values of the mutual interference of the output signal of the receiver of an orthogonal channel.

9. The receiver under item 8, characterized in that the evaluation unit mutual interference contains a block of fast Hadamard transform to convert PS-compressed signal in the fast signal Hadamard, block a decision to compare an output signal of a block of fast Hadamard transform with a predetermined value and delete characters orthogonal code, which are out of use, in accordance with the result of the comparison, the operation unit for multiplying the vector of the output signal of block a decision on the vector of correlation values between the orthogonal code and the corresponding quasiorthogonal code for the formation of values estimated interference quasiorthogonal code a combiner for combining the output signal of the operational unit and mixer for multiplying the output signal of the combiner to complex-conjugate value of a channel estimation for the formation of the assessed value of mutual interference channel using quasiorthogonal code channel using orthogonal code, it provides the blocks fast Hadamard transform blocks decision-making and operating units, which number corresponds to the number of masks quasiorthogonal code, with ispolnen determine characters orthogonal code, which are out of use by the following equation
and an operating unit configured to estimate the value of mutual interference by the following equation:

where m is the number of masks quasiorthogonal code;
A - orthogonal code used in the receiver of an orthogonal channel;
L is the length of the orthogonal code.

11. The way to eliminate mutual interference between the codes in the receiver, which uses orthogonal codes and quasiorthogonal codes in the communication system MDCRC, characterized in that exercise getting the value of a channel estimation signal, the pilot channel, the extended orthogonal code, through compression, perform receiving a channel signal, the extended quasiorthogonal code, the compression of the received channel signal and demodulates the compressed channel signal using the value of the channel estimation, assess the value of the mutual interference, the pilot-channel quasiorthogonal channel by multiplying correlation values between the orthogonal code corresponding to the pilot channel, and quasiorthogonal code, corresponding to quasiorthogonal channel, created using masnago compressed channel signal.

12. The way to eliminate mutual interference between the codes in the receiver, which uses orthogonal codes and quasiorthogonal codes and receives the channel signal, advanced quasiorthogonal code, in the communication system MDCRC, characterized in that exercise discernment of symbols orthogonal code, which remain without use, and symbols of the orthogonal code used by the fast Hadamard transform of the orthogonal coded symbols PS-compressed signal to provide a comparison output signal of the block quickly convert Hadamard orthogonal coded symbols with a predetermined value and the destruction of symbols of an orthogonal code, which remain without use, the multiplication of a vector signal free of symbols orthogonal code, which are not of use to the vector of correlation values between quasiorthogonal code signal quasiorthogonal channel and a corresponding orthogonal code to form the value of the estimated interference orthogonal code signal quasiorthogonal channel, and remove the value of the estimated interference signal from quasiorthogonal channel.

13. The solution ot the ing codes and receives the channel signal, advanced quasiorthogonal code, in the communication system MDCRC, characterized in that exercise discernment orthogonal code symbols, which are out of use, and orthogonal codes, which are used by the fast Hadamard transform PS-compressed signal, compare the output signal of the block fast Hadamard transform with a predetermined value and the destruction of symbols of an orthogonal code, which are out of use; multiply a vector signal free of orthogonal codes, which are out of use, the vector correlation values between the orthogonal code of the orthogonal channel signal and the corresponding quasiorthogonal code form is estimated interference orthogonal code signal quasiorthogonal channel; and removing the value of the estimated interference signal from quasiorthogonal channel.

 

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