RATE-ADAPTIVE MULTIPLE INPUT/MULTIPLE OUTPUT (MIMO) SYSTEMS
First Claim
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;
determining in said first station channel conditions between said first and said second stations;
in response to said channel conditions being determined to be first channel conditions, sending a request to said second station from said first station, said request requesting said second station send a particular stream of information through one or more of said second station antennas; and
in response to the channel conditions being determined to be second channel conditions, said request requesting said second station send a plurality of different streams of information over respective ones of the second station antennas, the plurality of different streams being ≦
M.
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Accused Products
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.
7 Citations
18 Claims
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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;
determining in said first station channel conditions between said first and said second stations; in response to said channel conditions being determined to be first channel conditions, sending a request to said second station from said first station, said request requesting said second station send a particular stream of information through one or more of said second station antennas; and in response to the channel conditions being determined to be second channel conditions, said request requesting said second station send a plurality of different streams of information over respective ones of the second station antennas, the plurality of different streams being ≦
M. - View Dependent Claims (2)
- 1, the method comprising;
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3. A method for communicating between units A and B, where unit A, having a plurality of unit A antennas, is a mobile device or a base station, and unit B is a base station or a mobile device, respectively, the method comprising:
each antenna i=1, 2, . . . , n, of unit A transmitting, in unit A time slots k that are synchronized across said plurality of unit A antennas, a training sequence TRki, a data payload sequence PYki, a sequence for detecting errors Eki, and a control sequence CTki, where said PYki, i=1, 2, . . . , n, are constructed to communicate an amount of information that is determined pursuant to control information that was received from time slot m of unit B and processed by unit A. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for communicating between units A and B, where unit A, having a plurality of unit A antennas, is a mobile device or a base station, and unit B is a base station or a mobile device, respectively, the method comprising:
each antenna i=1, 2, . . . , n, of unit A transmitting, in unit A time slots that are synchronized across said plurality of unit A antennas, a training sequence, a data payload sequence, a sequence for detecting errors, and a control sequence where said data payload sequence is constructed to communicate an amount of information that is determined pursuant to control information that was received from time slot m of unit B and processed by unit A. - View Dependent Claims (13, 14, 15, 16, 17, 18)
Specification