Diversity receiving system of in-phase combination type

Details Diversity receiving system of in-phase combination type Diversity receiving system of in-phase combination type

H - Electricity

04

B

325/76

H04B 1/16 (2006.01) H04B 7/08 (2006.01)

Patent

CA 1248592

ABSTRACT An in-phase combination type diversity receiving system includes a local oscillator and a first frequency converter for converting a first signal to an IF signal by using the output of the local oscillator. Also included are an endless phase shifter for phase-shifting the output of the local oscillator and a second frequency converter for converting a second signal to an IF signal by using the output of the endless phase shifter. The IF signals outputted by the first and second frequency converters are com- bined in a combinder. An automatic gain controlled (AGC) IF amplifier is provided for amplifying the output of the combiner and a level detector is provided for detecting the AGC voltage of the IF amplifier. A memory stores the output of the level detector. A comparator compares the output of the level detector which appears when the endless phase shifter is shifted by a pre- determined phase amount and the output of the memory corresponding to the output of the level detector which appeared before the shift of the endless phase shifter. An absolute value and a polarity of the difference between the two outputs is thereby obtained. A decision unit decides whether the absolute value is greater than a predetermined value and a sign discriminator discriminates the polarity of the difference. A phase shifter controller is con- structed, when the absolute value is not greater than the predeter- mined value, to phase-shift the endless phase shifter by another predetermined phase amount and, when the absolute value is greater than the predetermined value, to store the output of the level

525536

Affiliated with

Also associated with

Rating

Diversity receiving system of in-phase combination type does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Diversity receiving system of in-phase combination type, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Diversity receiving system of in-phase combination type will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1292369