Pulse or digital communications – Repeaters – Testing
Patent
1994-09-27
1996-10-15
Tse, Young T.
Pulse or digital communications
Repeaters
Testing
375206, 375345, 370 18, 455 383, 455 82, H04B 7005, H04B 169
Patent
active
055662013
ABSTRACT:
Disclosed herein are methods and apparatus for generating digital receiver and transmitter AGC values for a spread spectrum transceiver. A method includes the steps of (a) integrating the power of a received and sampled signal; (b) calculating a logarithm of the received integrated power; (c) subtracting a predetermined reference value from the logarithm of the power to generate a first error signal; (d) filtering the first error signal; (e) comparing the filtered first error signal to a predetermined first threshold; (f) incrementing or decrementing a first counter value and resetting a filter accumulator as a function of the result of the step of comparing; and (g) converting the first counter value to an analog voltage for controlling the gain of a spread spectrum receiver amplifier. The logarithm is preferably the second logarithm of the power. The method further includes generating a transmitter AGC value.
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Nokia Mobile Phones Ltd.
Tse Young T.
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