Carrier detection for a wireless local area network

Details Carrier detection for a wireless local area network Carrier detection for a wireless local area network

1990-12-24

1992-07-14

Swann, Tod

Pulse or digital communications

Repeaters

Testing

380 34, 375108, H04K 100

Patent

active

051310066

ABSTRACT:
A local area network (10) utilizes a wireless transmission link and has network stations (12) each having two differently polarized antennas (14, 16). Data transmission utilizes a spread spectrum code and in the receiver, correlator outputs are utilized in an integrator and registers circuit (54) to provide correlator output sample values integrated over a plurality of symbol intervals. These values are stored in registers (156) the contents of which are utilized to determine a peak value and a total value which are applied to a spike quality determination circuit (78) including a look-up table (200). The resultant spike quality output value represents the quality of the received signal and is utilized for carrier detection and for antenna selection.

REFERENCES:
patent: 4995052 (1991-02-01), Thorvaldsen
patent: 5031191 (1991-07-01), Hiramatsu et al.
patent: 5038362 (1991-08-01), Takeuchi et al.
"Design & Experimental results for Direct Sequence . . .", Kavehrad et al:, IEEE Jor On Selected Areas of Comm vol. SAC-5 No. 5, Jun. 1987, pp. 815-823.

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