SIGNAL PROCESSING METHOD, TRANSMITTING APPARATUS AND RECEIVING APPARATUS BASED ON EST IN MIMO SPATIAL MULTIPLEXING

摘要

Disclosed are a signal processing method, a signal transmitting apparatus, and a signal receiving apparatus in an energy spreading transform (EST) based multiple-input multiple-output (MIMO) spatial multiplexing communication system. The signal receiving apparatus in an EST based MIMO spatial multiplexing communication system comprises: multiple receiving antennas; a detecting unit for detecting a signal received by the receiving antennas; an IEST performing unit for performing EST demodulation about the signal of the detecting unit; a determining unit for determining a symbol level of the signal outputted by the IEST performing unit; a symbol delay unit for delaying the signal determined by the determining unit for predetermined time; and an EST performing unit for performing EST modulation about the signal outputted by the symbol delay unit; wherein the detecting unit designs a forward filter and a feedback filter for maximizing the signal to interference plus noise ratio (SINR) of the signal determined by previous repetitions; and the signal receiving apparatus in an EST based MIMO spatial multiplexing communication system detects the received signal using the forward filter and the feedback filter. According to the present invention, the signal transmitting apparatus improves bit error rate (BER) performance by transmitting a transmission signal to the signal receiving apparatus after previously processing the transmission signal to minimize the BER of a MIMO spatial multiplexing system. [Reference numerals] (114) Signal processing unit;(AA) Transmission side Ant 1 EST performing unit;(BB) Transmission side Ant 2 EST performing unit;(CC) Transmission side Ant N_t EST performing unit