Methods for optimizing time variant communication channels
First Claim
1. A method of communication, comprising:
- transmitting data over a wireless channel using a first station, wherein the channel comprises tones;
receiving the data using a second station;
estimating the wireless channel using at least information digitally encoded into the received data indicating a transmit power level used on the received data;
allocating subsequently transmitted data among the tones according to the channel estimation; and
transmitting the allocated data.
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Abstract
Methods and apparatus for optimizing wireless communications channels by employing multi-channel modulation techniques in wireless communication systems is disclosed. The wireless communications channel may comprise tones, and data may be allocated differently among the different tones according to the channel characterization measurements. In one embodiment, a method may include: transmitting data over a wireless channel using a first station (e.g., an access point), receiving the data using a second station, performing calculations on the received data, and allocating subsequent data transmissions among the tones according to the calculations. Other embodiments may utilize superfluous data transmissions—for example, data coming from the access point that is intended for other stations—in order to calculate channel characterization. Preferably, any portion of the transmitted data (e.g., preamble, header, data, etc.) may be used to calculate channel characterization.
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Citations
32 Claims
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1. A method of communication, comprising:
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transmitting data over a wireless channel using a first station, wherein the channel comprises tones; receiving the data using a second station; estimating the wireless channel using at least information digitally encoded into the received data indicating a transmit power level used on the received data; allocating subsequently transmitted data among the tones according to the channel estimation; and transmitting the allocated data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 32)
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17. A wireless network, comprising:
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a first station that transmits data over a wireless channel, wherein the channel comprises tones; and a second station that receives said data, performs calculations on said data to characterize the channel, and allocates subsequent data transmissions among the tones according to the calculations, wherein channel characterization is based at least in part on information digitally encoded into the received data indicating a transmit power level used on the data transmitted by the first station. - View Dependent Claims (18, 19, 20, 21, 22, 23)
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24. A wireless network, comprising:
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an access point; a plurality of stations coupled to the access point using a wireless channel, wherein coordination data is exchanged between the access point and the plurality of stations to coordinate which station has control of the channel; and wherein the coordination data is also used to obtain channel characteristics, wherein an indication of transmit power level used on the coordination data is digitally encoded into said coordination data. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31)
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Specification