BASEBAND PROCESSING METHOD FOR IMPROVING SIGNAL-TO-NOISE RATIO BASED ON MULTIPLE SAMPLING

摘要

The present invention discloses a baseband processing method for improving signal-to-noise ratio (SNR) based on multiple sampling. The method includes the following steps: (a) Sampling is performed for N times in each chip for the received signals to obtain N-path sampled data; (b) channel estimation is performed for the received sampled signal of each path respectively; (c) the channel estimation of each path is compared with each other to determine the channel estimation that has relatively greater power as well as less noise correlation, thus constituting a matched filtering matrix; (d) joint detection is performed for users signals by using system matrix and matched filtering matrix, thus obtaining the symbol of each user. Said method of the present invention can improve SNR and system performance by selecting the channel estimation tap that has relatively greater power as well as uncorrelated noise in the multi-path samples and participating in the matched filtering interference elimination of the joint detection. It can be used in either base station or terminal, and can be used in either single antenna environment or multiple-antenna environment.