MIMO PGRC system and method

Abstract

A method of transmitting a wireless signal (FIGS. 3A-3C) is disclosed. A data stream is divided (306) into a first data stream and a second data stream. The first data stream is encoded (300) at a first data rate. The second data stream is encoded (320) at a second data rate different from the first data rate. A first part of the encoded first data stream is transmitted from a first transmit antenna (308). A second part of the encoded first data stream is transmitted from a second transmit antenna (312).

Description

CROSS-REFERENCES TO RELATED APPLICATIONS

[0001] This application claims the benefit, under 35 U.S.C. §119(e)(1), of U.S. Provisional Application No. 60 / 678,471 (TI-60504PS), filed May 6, 2005, and incorporated herein by this reference.BACKGROUND OF THE INVENTION

[0002] The present embodiments relate to wireless communications systems and, more particularly, to Multiple-input Multiple-output (MIMO) communication with Per Group Rate Control (PGRC).

[0003] Wireless communications are prevalent in business, personal, and other applications, and as a result the technology for such communications continues to advance in various areas. One such advancement includes the use of spread spectrum communications, including that of code division multiple access (CDMA) which includes wideband code division multiple access (WCDMA) cellular communications. In CDMA communications, user equipment (UE) (e.g., a hand held cellular phone, personal digital assistant, or other) communicates with a base sta...

Examples

Embodiment Construction

[0025] The preferred embodiments of the present invention provide circuit simplification for a wireless communication system. The wireless communication system preferably provides for the Long Term Evolution of High-Speed Downlink Packet Access (HSDPA) and Multiple-input Multiple-output (MIMO) as will be explained in detail. A simplified block diagram of a wireless transmitter of the present invention for such a system is shown in FIG. 3A. The wireless transmitter includes two separate modulation code schemes (MCS) and four transmit antennas. Each MCS preferably includes an encoder, an interleaver, and a symbol mapper.

[0026] The wireless transmitter of FIG. 3A receives an input data stream from a baseband processor (not shown). This data stream may include pilot signals, control signals, and data signals for synchronization and control of remote wireless user equipment (UE). The data stream is divided into first and second data streams by serial-to-parallel circuit 306. Both first ...

CROSS-REFERENCES TO RELATED APPLICATIONS

[0001] This application claims the benefit, under 35 U.S.C. §119(e)(1), of U.S. Provisional Application No. 60 / 678,471 (TI-60504PS), filed May 6, 2005, and incorporated herein by this reference.BACKGROUND OF THE INVENTION

[0002] The present embodiments relate to wireless communications systems and, more particularly, to Multiple-input Multiple-output (MIMO) communication with Per Group Rate Control (PGRC).

[0003] Wireless communications are prevalent in business, personal, and other applications, and as a result the technology for such communications continues to advance in various areas. One such advancement includes the use of spread spectrum communications, including that of code division multiple access (CDMA) which includes wideband code division multiple access (WCDMA) cellular communications. In CDMA communications, user equipment (UE) (e.g., a hand held cellular phone, personal digital assistant, or other) communicates with a base sta...

Examples

Embodiment Construction

[0025] The preferred embodiments of the present invention provide circuit simplification for a wireless communication system. The wireless communication system preferably provides for the Long Term Evolution of High-Speed Downlink Packet Access (HSDPA) and Multiple-input Multiple-output (MIMO) as will be explained in detail. A simplified block diagram of a wireless transmitter of the present invention for such a system is shown in FIG. 3A. The wireless transmitter includes two separate modulation code schemes (MCS) and four transmit antennas. Each MCS preferably includes an encoder, an interleaver, and a symbol mapper.

[0026] The wireless transmitter of FIG. 3A receives an input data stream from a baseband processor (not shown). This data stream may include pilot signals, control signals, and data signals for synchronization and control of remote wireless user equipment (UE). The data stream is divided into first and second data streams by serial-to-parallel circuit 306. Both first ...

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