Inventors:
Narayan Prasad - Wyncote PA, US
Neda Cvijetic - Plainsboro NJ, US
Sampath Rangarajan - Bridgewater NJ, US
Ting Wang - W. Windsor NJ, US
Assignee:
NEC LABORATORIES AMERICA, INC. - Princeton NJ
International Classification:
H04L 27/06
Abstract:
The present invention employs a look up table based implementation for the metric computations which eliminate redundancy and substantially reduce the number of multiplications. Moreover, inventive method exploits the fact that the un-normalized constellation symbols are complex integers so that the product of a real-number and an un-normalized constellation symbol can be implemented by only additions. The inventive method also enables a greater efficiency for whitening colored noise prior to demodulation, one of which involves no square-root operation. The invention results in less complexity, faster operation, lower power consumption, without sacrificing performance