Telecommunications – Transmitter – Plural separate transmitters or channels
Reexamination Certificate
2007-02-27
2007-02-27
Anderson, Matthew (Department: 2618)
Telecommunications
Transmitter
Plural separate transmitters or channels
C455S102000, C455S168100, C455S209000
Reexamination Certificate
active
10623798
ABSTRACT:
A method is provided for operating a plurality of overlapping wireless networks such that they do not interfere with each other. This is accomplished by having each network transmit at a frequency that is offset from a base frequency by an integer multiple of an offset frequency. The offset frequency is generally a small fraction of the base frequency so that the spectral properties of each network are roughly the same. However, each network will transmit at a unique frequency with respect to all of the other overlapping networks. The offset values are preferably symmetrical around zero, and the offset for one network can be zero.
REFERENCES:
patent: 5274665 (1993-12-01), Schilling
patent: 2004/0203393 (2004-10-01), Chen
John G. Proakis, Digital Communications, 4th Ed., 1983, 1989, 1995, 2001, pp. 262 and 336-339, McGraw Hill, New York.
Anderson Matthew
Dao Minh
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