Multiple-input multiple-output radio transceiver

Abstract

A MIMO radio transceiver to support processing of multiple signals for simultaneous transmission via corresponding ones of a plurality of antennas and to support receive processing of multiple signals detected by corresponding ones of the plurality of antennas. The radio transceiver provides, on a single semiconductor integrated circuit, a receiver circuit or path for each of a plurality of antennas and a transmit circuit or path for each of the plurality of antennas. Each receiver circuit downconverts the RF signal detected by its associated antenna to a baseband signal. Similarly, each transmit path upconverts a baseband signal to be transmitted by an assigned antenna.

Description

[0001] This application claims priority to the following U.S. Provisional Patent Applications (each priority application is hereby incorporated by reference in its entirety): [0002] US60 / 374,531 filed April 22, 2002; [0003] US60 / 376,722 filed April 29, 2002; [0004] US60 / 319,336 filed on June 21, 2002; [0005] US60 / 319,360 filed on June 27, 2002; [0006] US60 / 319,434 filed July 30, 2002. Background technique [0007] The present invention relates to multiple input multiple output (MIMO) radio transceivers. [0008] A major goal of wireless communication system design is the most efficient use of the available light spectrum. Examples of techniques to increase spectral efficiency include coded modulation techniques such as turbo coding and trellis coded modulation, and multiple access techniques such as Code Division Multiple Access (CDMA). [0009] There is another way of optimizing spectral efficiency that has recently become popular in academia, namely the use of...

AI Technical Summary

Problems solved by technology

However, previous efforts to exploit the advantages of MIMO systems have failed, in part due to the inability to develop low-cost MIMO radios

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