Packet configuring method and packet receiver

Details Packet configuring method and packet receiver Packet configuring method and packet receiver

2008-01-01

2008-01-01

Pham, Chi (Department: 2616)

Multiplex communications

Pathfinding or routing

Switching a message which includes an address header

C375S147000

Reissue Patent

active

11301328

ABSTRACT:
A packet receiver is provided that accurately estimates a frequency offset and a channel impulse response even when a transmitted packet is detected with an erroneous timing in a communication mode (typified by the LAN (local Area Network)) where packets are asynchronously transmitted, and thus provides a training sequence which can demodulate the received packet. The training sequence101is formed of K sequences100-1to100-K serially connected, each formed of the same N symbols. Even in a channel where a intersymbol interference occurs when such a training sequence is used, a received signal shifted by the time corresponding to N-symbols becomes the signal which is different by a phase difference caused by a frequency offset between the transmitter and the receiver. Thus, even if the head of a packet is detected with an erroneous timing, the frequency offset can be estimated.

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Japanese Office Action issued Mar. 13, 2001 (w/ English translation of relevant portion).

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