Rate-adaptive multiple input/multiple output (MIMO) systems

• US 10,484,055 B2
• Filed: 08/27/2018
• Issued: 11/19/2019
• Est. Priority Date: 01/31/2003
• Status: Expired due to Term

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Luo, Hui, Sollenberger, Nelson Ray, Winters, Jack Harriman
• Primary Examiner(s): Wendell, Andrew
• Application Number:
  US16/113,099
• Publication Number:
  US 20180367189A1
• Time in Patent Office: 449 Days
• CPC Class Codes: H04B 17/345 Interference values signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR] H04B17/336
• CPC Class Codes: H04B 7/0413 MIMO systems
• CPC Class Codes: H04B 7/0667 of delayed versions of same signal using space-time coding H04L1/0618
• CPC Class Codes: H04B 7/0669 using different channel coding between antennas space-time coding H04L1/0618
• CPC Class Codes: H04B 7/0891 Space-time diversity rake receivers H04B1/7115; space-time decoding H04L1/0631
• CPC Class Codes: H04L 1/0002 by adapting the transmission rate
• CPC Class Codes: H04L 1/0003 by switching between different modulation schemes
• CPC Class Codes: H04L 1/0009 by adapting the channel coding H04L1/1812 takes precedence
• CPC Class Codes: H04L 1/0025 Transmission of mode-switching indication
• CPC Class Codes: H04L 1/0618 Space-time coding
• CPC Class Codes: H04L 1/1671 the supervisory signal being transmitted together with control information
• CPC Class Codes: H04L 1/1809 Selective-repeat protocols
• CPC Class Codes: H04W 52/42 in systems with time, space, frequency or polarisation diversity

Abstract

A rate-adaptive method of communicating over a multipath wireless communication system uses multiple links such that each end of a link uses multiple transmit and receive antennas. A number of independent streams that are to be transmitted for each link is determined based on an overall system performance measure. In addition, the system may also jointly determine the best modulation, coding, power control, and frequency assignment for each link, based on an overall system performance measure. In OFDM systems, the number of independent streams, as well as the modulation, coding, and power control, may be determined on a tone-by-tone basis based on an overall system performance measure.

Claims

1. A method executed in a first station having a plurality of first station antennas that communicates with a second station having M second station antennas, M>

1, the method comprising;

receiving, from said second station on a frequency simultaneously, a plurality of frames through two or more of said first station antennas, each frame including a training stream, a payload stream, and a control stream, wherein

respective control streams of said plurality of frames are identical streams and transmitted by transmission diversity through said two or more of said second station antennas.

2. The method as recited in claim 1, wherein

respective payload streams of said plurality of frames are transmitted on the frequency simultaneously by either one of transmission diversity or MIMO through said two or more of said second station antennas,

in transmission diversity, respective payload streams are identical streams, and

in MIMO, respective payload streams are different streams, said different streams being ≤

M.

3. A method executed in a second station having M second station antennas, M>

1, which communicates with a first station having a plurality of first station antennas, the method comprising;

generating a plurality of frames, each frame including a training stream, a payload stream, and a control stream; and

transmitting, on a frequency simultaneously, said plurality of frames through two or more of said second station antennas, respective control streams of said plurality of frames being identical streams and transmitted by transmission diversity through said two or more of said second station antennas.

4. The method as recited in claim 3, wherein

respective payload streams of said plurality of frames are transmitted on the frequency simultaneously by either one of transmission diversity or MIMO through said two or more of said second station antennas,

in transmission diversity, respective payload streams are identical streams, and

in MIMO, respective payload streams are different streams, said different streams being ≤

M.

5. A receive device communicating with a transmit device through a plurality of receive antennas, the transmit device communicating through M transmit antennas, M>

1, the receive device comprising;

circuitry configured to receive, from said transmit device on a frequency simultaneously, a plurality of frames through two or more of said plurality of receive antennas, each frame including a training stream, a payload stream, and a control stream, wherein

respective control streams of said plurality of frames are identical streams and transmitted by transmission diversity through said two or more of said transmit antennas.

6. The receive device as recited in claim 5, wherein

respective payload streams of said plurality of frames are transmitted on the frequency simultaneously by either one of transmission diversity or MIMO through said two or more of said transmit antennas,

in transmission diversity, respective payload streams are identical streams, and

in MIMO, respective payload streams are different streams, said different streams being ≤

M.

7. A transmit device communicating with a receive device through M transmit antennas, M>

1, the receive device communicating through a plurality of receive antennas, the transmit device comprising;

circuitry configured to;

generate a plurality of frames, each frame including a training stream, a payload stream, and a control stream; and

transmit, on a frequency simultaneously, said plurality of frames through two or more of said transmit antennas, respective control streams of said plurality of frames being identical streams and transmitted by transmission diversity through said two or more of said transmit antennas.

8. The transmit device as recited in claim 7, wherein

respective payload streams of said plurality of frames are transmitted on the frequency simultaneously by either one of transmission diversity or MIMO through said two or more of said transmit antennas,

in transmission diversity, respective payload streams are identical streams, and

in MIMO, respective payload streams are different streams, said different streams being ≤

M.