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公开(公告)号：AU2003239364A1
公开(公告)日：2003-11-17
申请号：AU2003239364
申请日：2003-05-05
Applicant: ATHEROS COMM INC
Inventor： ZENG CHAOHUANG STEVE
IPC: H04L25/03
Abstract: A system and method are disclosed for recovering a current data symbol that is part of a sequence of data symbols from a received signal. Recovering the current data symbol includes determining a set of candidate current data symbols from a set of possible current data symbols wherein the set of candidate current data symbols is a subset of the possible current data symbols that does not include all of the possible current data symbols; determining a set of candidate data symbol sequences wherein each candidate data symbol sequence includes one of the candidate current data symbols; and selecting a recovered data symbol sequence that matches the received signal from the set of candidate data symbol sequences.
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公开(公告)号：AU2003239364A8
公开(公告)日：2003-11-17
申请号：AU2003239364
申请日：2003-05-05
Applicant: ATHEROS COMM INC
Inventor： ZENG CHAOHUANG STEVE
Abstract: A system and method are disclosed for recovering a current data symbol that is part of a sequence of data symbols from a received signal. Recovering the current data symbol includes determining a set of candidate current data symbols from a set of possible current data symbols wherein the set of candidate current data symbols is a subset of the possible current data symbols that does not include all of the possible current data symbols; determining a set of candidate data symbol sequences wherein each candidate data symbol sequence includes one of the candidate current data symbols; and selecting a recovered data symbol sequence that matches the received signal from the set of candidate data symbol sequences.
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公开(公告)号：AU2003225894A1
公开(公告)日：2003-11-17
申请号：AU2003225894
申请日：2003-03-18
Applicant: ATHEROS COMM INC
Inventor： ZENG CHAOHUANG STEVE , MCFARLAND WILLIAM J
Abstract: A data packet, comprising a preamble and the preamble comprising a plurality of synchronization bits, is received where the preamble may be of either a first preamble type or a second preamble type. Channel estimation is performed using at least a first portion of the plurality of synchronization bits. It is determined whether the preamble is of the first preamble type or of the second preamble type, where the determination overlaps in least in part with the channel estimation. The performance of the channel estimation is controlled such that: in the event it is determined the preamble is of the first preamble type, the performance of the channel estimation continues for a second portion of the plurality of synchronization bits, adjacent to the first portion of the plurality of synchronization bits, after the processing of the first portion of the plurality of synchronization bits; in the event it is determined the preamble is of the second preamble type, the performance of the channel estimation ends after processing the first portion of the plurality of synchronization bits.
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公开(公告)号：AU2003225857A1
公开(公告)日：2003-11-17
申请号：AU2003225857
申请日：2003-03-18
Applicant: ATHEROS COMM INC
Inventor： ZENG CHAOHUANG STEVE , MCFARLAND WILLIAM J
Abstract: A modified approach to detecting the start frame delimiter (SFD) is disclosed. A receiving system scans a decoded but not yet de-scrambled received signal for a scrambled version of the SFD associated with the preamble format being used. Using this approach, it is not necessary to use any bits intended for use in synchronization to initialize a de-scrambler so as to be able to de-scramble the SFD portion of the preamble for detection. The bits that otherwise would have been dedicated to initializing the de-scrambler may then be used for synchronization, as intended. Detecting fewer than all bits comprising a start frame delimiter is described. Bits not used for SFD detection may be used for other purposes, such as synchronization.
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