Partitioning scheme for an OFDM transceiver

Details Partitioning scheme for an OFDM transceiver Partitioning scheme for an OFDM transceiver

2008-07-15

2008-07-15

Yao, Kwang B. (Department: 2616)

Multiplex communications

Communication over free space

Having a plurality of contiguous regions served by...

C455S101000

Reexamination Certificate

active

07400609

ABSTRACT:
A channel estimation method for an OFDM transceiver. The OFDM transceiver is configured to derive channel state information (CSI) for a communication channel by processing the preamble of a received OFDM packet. The received packet could be, for example, an unsolicited data packet or a solicited service packet such as an acknowledgement packet. The derived CSI information can then applied to the generation of weighted OFDM packets for transmission over the communication channel. As a result, an improved effective communication channel may be established between this OFDM transceiver and another OFDM transceiver. A channel estimation method of the present invention may be implemented in an access point (AP) or a client terminal (CLT) of a WLAN system. In either case, the improved communication channel can be used, for example, to extend the range corresponding to a selected transmission bit rate and/or to increase the transmission bit rate between the AP and a CLT. In addition or alternatively, the improved communication channel can be used to reduce emitted RF power and, therefore, to reduce electrical power consumption.

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