Code-division multiplex signal decorrelation/identification method

Abstract

The present invention relates to a decorrelation distinguishing system of code division multiple access signals, and provides a new multi-user receiver configuration technology, which solves the problem of multi-user receivers such as interference canceller, decorrelator and minimum mean square error detection of user signals Problems with separating functions. That is, a decorrelation / identification method of a code division multiple access signal is provided to realize the power band amplitude product required for 1-bit transmission (which is an evaluation benchmark for the CDMA method much better than the performance of the above-mentioned method And add a function of sequentially judging the best user to the conventional minimum mean square error detector MMSE-D represented by the dotted line in the block diagram of the sequential detection type minimum mean square error detection method.

Description

technical field

[0001] The present invention relates to a code division multiple access communication system (CDMA) using spread spectrum modulation, which can reduce white noise mixed in transmission processing and interference noise generated in multi-user signal separation processing by a receiver, and can enhance frequency Utilization efficiency, and can reduce the power bandwidth product. In this case, a modulation / demodulation technique for a transceiver of a mobile communication system in which spread spectrum modulation is applied to a BPSK signal is taken as an example to explain a user separation technique for a multi-user receiver. Background technique

[0002] Spread spectrum communication is a system using a spread spectrum modulation technique in which a spread sequence is modulated by transmitting data. Due to this spread modulation, a data sequence having a relatively narrow bandwidth is spectrally spread into a wide frequency band, generating a spread spect...

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