Method and apparatus for handling time-drift
AssigneeTelefonaktiebolaget L M Ericsson (publ)
InventorsJoakim Persson, Leif Wilhelmsson
Life of this patent
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Abstract
A method for maintaining synchronization between a transmitter and a receiver is disclosed. The method offsets time drift which causes a degradation in the quality of communication between a transmitter and a receiver. The method comprises using a first sampling time to obtain a first sequence of hard decision symbols for decoding contents of a portion of a received packet, switching to a second sampling time upon degradation in a reliability of the symbols, and using the second sampling time to obtain a second sequence of hard decision symbols for decoding contents of a remaining portion of the received packet.
Claims18
A method of handling time drift during packet reception, said method comprising the steps of:
- using a first sampling time to obtain a first sequence of hard decision symbols for decoding contents of a first portion of said received packet;
- switching to a second sampling time upon degradation in a reliability of the symbols;
- and
- using said second sampling time to obtain a second sequence of hard decision symbols for decoding contents of a second portion of said received packet.
A method of handling time drift during packet reception, said method comprising the steps of:
- using a first sampling time to obtain a first sequence of hard decision symbols for decoding contents of a first portion of said received packet;
- switching to a second sampling time upon degradation in a reliability of the first sequence of symbols;
- using said second sampling time to obtain a second sequence of hard decision symbols for decoding contents of a second portion of said received packet;
- switching to a third sampling time upon degradation in a reliability of the second sequence of symbols;
- using said third sampling time to obtain a third sequence of hard decision symbols for decoding contents of a third portion of said received packet.
A communication system, comprising:
- a transmitting means for transmitting data in packets;
- and
- a receiving means for receiving said data, wherein said receiver comprises:
- means for obtaining a first sequence of hard decision symbols using a first sampling time, the decision symbols decoding contents of a portion of a received packet;
- a detection means for detecting a degradation in a reliability of the symbols;
- a switching means for switching from said first sampling time to a second sampling time, the second sampling time being used to obtain a second sequence of hard decision symbols for decoding contents of a remaining portion of the packet.
Dependencies are inferred from the claim text.