Frequency hop sequences for multi-band communication systems

Details Frequency hop sequences for multi-band communication systems Frequency hop sequences for multi-band communication systems

2006-06-27

2006-06-27

Chin, Stephen (Department: 2634)

Pulse or digital communications

Spread spectrum

Frequency hopping

C375S133000, C375S130000, C370S342000, C370S203000

Reexamination Certificate

active

07068703

ABSTRACT:
Techniques to generate FH sequences having excellent correlation properties and to use these FH sequences in multi-band communication systems (e.g., OFDM systems). In one aspect, FH sequences may be generated based on an algebraic expression y(k)=logαb/k (mod p), where k is an index, p is an odd prime number, α is a primitive root of p, b is an integer, and (mod p) denotes modulo-p operation. Different FH sequences may be generated with different values for b, α, and/or p. In another aspect, data may be transmitted using FH sequences generated based on the expression y(k)=logαb/k (mod p). In a first scheme, data may be transmitted on “traffic” channels, each of which may be associated with a respective FH sequence that determines the specific subband to use in each slot. In a second scheme, each data transmission is sent on subbands determined based on all or a portion of an FH sequence.

REFERENCES:
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patent: 6347385 (2002-02-01), Cui et al.
patent: 6553018 (2003-04-01), Ichihara
patent: 6606296 (2003-08-01), Kokkonen
patent: 2004/0213326 (2004-10-01), Parizhsky et al.

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