VARYING SIZE COEFFICIENTS IN A WIRELESS LOCAL AREA NETWORK RETURN CHANNEL
First Claim
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5. A method for sending channel related data over a communication link, said method comprising the steps of:
- (a) at a receiver, receiving a packet sent by a transmitter over a forward channel;
(b) estimating channel state information (CSI) from said packet;
(c) quantizing said CSI into varying size coefficients, wherein the resolution of said coefficients is dependent upon at least one of the following parameters;
signal to noise ratio (SNR) of forward channel;
signal to noise ratio (SNR) of return channel;
actual data transfer rate in the forward channel; and
actual data transfer rate in the return channel;
(d) sending said varying size coefficients over the return channel to the transmitter.
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Abstract
Sending channel related parameters known as channel state information (CSI) over a WLAN return channel. The size of these coefficients is not fixed. Rather, the coefficients are quantized in a certain resolution, which is determined adaptively according to a measure of the channel quality. This allows minimizing the component of the bandwidth of the wireless connection that is not used for payload transfer.
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34 Claims
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5. A method for sending channel related data over a communication link, said method comprising the steps of:
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(a) at a receiver, receiving a packet sent by a transmitter over a forward channel; (b) estimating channel state information (CSI) from said packet; (c) quantizing said CSI into varying size coefficients, wherein the resolution of said coefficients is dependent upon at least one of the following parameters; signal to noise ratio (SNR) of forward channel; signal to noise ratio (SNR) of return channel; actual data transfer rate in the forward channel; and actual data transfer rate in the return channel; (d) sending said varying size coefficients over the return channel to the transmitter. - View Dependent Claims (6, 7, 8, 9, 10)
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11. A method of wireless communication, comprising:
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(a) sending a packet over a forward channel; (b) receiving the packet; (c) estimating channel state information (CSI) from the received packet; (d) determining coefficients for the CSI, wherein the coefficients are dependent upon adaptive qualitative and/or quantitative channel-related parameters; and (e) sending said coefficients over a return channel. - View Dependent Claims (1, 2, 3, 4, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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16-1. The method of claim 11, wherein the step (d) of determining coefficients comprises:
taking into account at least one of the following parameters;
signal to noise ratio (SNR) of said channel, actual data transfer rate, or any other qualitative and/or quantitative parameter of the forward channel.
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21. A method of optimizing a transmission process over a WLAN channel comprising a forward communication link and a return communication link, the method comprising:
from a receiver, sending channel related parameters over a WLAN return channel to a transmitter, wherein the parameters describe a channel response function and are sent via a return/feedback channel to the transmitter as a means for optimizing the transmission process. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
Specification