Reduced complexity decision circuitry

摘要: The present invention groups a set of N, nearly orthogonal, CCK code words into M subgroups, with each subgroup consisting N/M orthogonal words. For the 64-ary communication standard for wireless local area networks (WLAN), N is 64 and preferably 8. Based on subgrouping, most significant bit (MSB) comparitors, instead full-scale are used to compare cross-correlations subgroup. In containing desired maximum correlation, all other cross-correlations, except maximum, zero in an ideal case, or very close noisy environment due selected orthogonality. correlation value can be distinguished by looking at only bits among cross-correlations. subgroups that do not contain global, value, it does matter which cross-correlation picked. from will include global one monitored select corresponding word.