Patent ID: 8565295
Filing Date: 2013-10-22
Classification: H04L

Abstract:
1. A low-complexity channel noise reduction method for a multi-carrier mode in a wireless local area network, comprising the following steps: dividing a received frequency domain long training sequence by a locally stored long training sequence to obtain an original noise-containing frequency domain channel; performing Wiener filtering to the original noise-containing frequency domain channel by using a plurality of groups of prestored Wiener filtering coefficients according to their corresponding filtering methods to obtain a plurality of groups of noise-reduced frequency domain channels; performing equalization to received frequency domain signaling symbols by using a frequency domain channel response provided by the original noise-containing frequency domain channel, and demodulating, deinterleaving and convolutionally decoding the equalized signaling symbols to obtain effective signaling bits; performing encoding, interleaving, modulation and OFDM framing to the obtained effective signaling bits according to the order at a transmitting end to obtain OFDM signaling symbols, and dividing the received frequency domain signaling symbols by the OFDM signaling symbols to obtain a signaling frequency domain channel; and selecting a group of noise-reduced frequency domain channel that is closest to a response of the signaling frequency domain channel from the plurality of groups to be an optimal frequency domain channel.