Provided by: Institute of Electrical & Electronic Engineers
Date Added: Aug 2012
The increased demand for a high data rate and spectra-efficient modulation techniques has led to the widespread adoption of Orthogonal Frequency Division Multiplexing (OFDM) systems with various communication standards, e.g. Digital Video Broadcasting - Satellite services to Handhelds (DVB-SH). However, the conventional OFDM systems have a poor Bit Error Rate (BER) performance, since these systems do not exploit either frequency diversity or time diversity. Linear pre-coding techniques are one of the most important techniques that have been extensively used to improve the conventional OFDM system performance by exploiting the multipath channel frequency diversity.