Patent ID: 7933357
Filing Date: 2011-04-26
Classification: H04B,H04L,H04W

Abstract:
1. A transmitter in a multi-user Multiple-Input Multiple-Output (MIMO) communication system, the transmitter comprising: a filter portion for receiving quantized Channel State Information (CSI) and Channel Quality Information (CQI) from a receiver, calculating a transmit filter value using the quantized CSI and the CQI, determining an appropriate Adaptive Modulation and Coding (AMC) level for the receiver, and sending a pilot signal including the transmit filter value and information about the determined AMC level on subcarriers in one of a preamble and data symbols; and two antennas for sending an output of the filter portion to a receiver and receiving data from the receiver; wherein the filter portion calculates the pilot signal including the transmit filter value by where k is used to identify the receiver and a subcarrier, x