RECEIVER STRUCTURES FOR SPATIAL SPREADING WITH SPACE-TIME OR SPACE-FREQUENCY TRANSMIT DIVERSITY

摘要

A receiving entity (150) obtains received symbols for a data transmission having at least one data symbol stream sent with space-time transmit diversity (STTD). The receiving entity derives an overall channel response matrix in accordance w ith the STTD encoding scheme used for the data transmission, derives a spatial f ilter matrix based on the overall channel response matrix, and performs spatial matched filtering on a vector of received symbols for each 2-symbol interval to obtain a vector of detected symbols for the 2-symbol interval. The receiving ent ity may perform post-processing (e.g., conjugation) on the detected symbols if n eeded. Alternatively, the receiving entity derives a spatial filter matrix based on an effective channel response matrix, performs spatial matched filtering on the received symbols for each symbol period to obtain detected symbols for that symbol period, A receiving entity obtains received symbols for a data transmissi on having at least one data symbol stream sent with space-time transmit diversit y (STTD). The receiving entity derives an overall channel response matrix in acc ordance with the STTD encoding scheme used for the data transmission, derives spatial filter matrix based on the overall channel response matrix, and performs spatial matched filtering on a vector of received symbols for each 2-symbol int erval to obtain a vector of detected symbols for the 2-symbol interval. The rece iving entity may perform post-processing (e.g., conjugation) on the detected sym bols if needed. Alternatively, the receiving entity derives a spatial filter mat rix based on an effective channel response matrix, performs spatial matched filt ering on the received symbols for each symbol period to obtain detected symbols for that symbol period, and combines multiple estimates obtained for each data s ymbol sent with STTD.