SYSTEMS AND METHODS FOR IMPROVED WIRELESS CHANNEL ESTIMATION

摘要

Systems and methods are disclosed herein to provide improved channel estimation in a wireless data communication system, including but not limited to Multiple Input Multiple Output (MIMO) and Orthogonal Frequency Division Multiplexing (OFDM) communication systems. In accordance with one or more embodiments and aspects thereof, a channel estimation system is disclosed that regenerates a representation of the original transmitted signal from the received digital bitstream and selectively applies it to refine and improve channel estimation and signal equalization calculations using the data symbols contained within received frames. Such a system may offer improved capabilities such as more accurate signal reception, reduced bit error ratio, and improved Multi-User MIMO (MU-MIMO) reception.

主权项

1. A system for generating channel estimates or a channel equalization matrix for digital communications over a wireless channel, comprising:
a receive processor for receiving information over said wireless channel and converting the information to a first stream of modulated symbols; a buffer for storing said first stream of modulated symbols as a buffered stream of modulated symbols; a demodulation function for converting said first stream of modulated symbols to a digital bitstream; a modulation function for converting said digital bitstream back to a second stream of modulated symbols; and a channel estimation processor operatively coupled to said buffer and said modulation function, wherein said channel estimation processor is operative to calculate at least one of: a first wireless channel estimate and a first channel equalization matrix utilizing said buffered stream of modulated symbols and said second stream of modulated symbols.