Pulse or digital communications – Repeaters – Testing
Patent
1996-06-20
1999-12-14
Bocure, Tesfaldet
Pulse or digital communications
Repeaters
Testing
375274, 375283, H04K 100, H01L 2714, H01L 2722
Patent
active
060027118
ABSTRACT:
A transmitter and a receiver of a spread spectrum communication system for compensating carrier frequency offsets between the transmitter and the receiver. The transmitter includes: a first multiplier for multiplying a pseudo noise signal and input data intended for transmission; a differential encoder for differentially encoding a signal outputted from the first multiplier; a modulator for modulating a signal outputted from the differential encoder; a second multiplier for multiplying the signal modulated by the modulator and a transmitting carrier and for outputting a spread spectrum signal; and an antenna for propagating the spread spectrum signal in the air. The receiver includes: a generator for generating a receiving carrier corresponding to a frequency offset signal; a first multiplier for multiplying a spread spectrum signal received from the transmitter and the receiving carrier and outputting the multiplied signal as a first low frequency signal; a second multiplier for multiplying the spread spectrum signal by a modified carrier in which the receiving carrier is modified by a given phase, and outputting the multiplied signal as a second low frequency signal; a differential detector for detecting a phase rotation amount between each complex digital signals; a correlator for correlating a pseudo noise code with the phase rotation detected by the differential detector; and a frequency offset measurer for measuring a frequency offset between the spread spectrum signal and the receiving carrier by using the signal from the correlator and outputting the frequency control signal for adjusting the receiving carrier signal.
REFERENCES:
patent: 5488629 (1996-01-01), Takahashi et al.
patent: 5504774 (1996-04-01), Takai et al.
patent: 5506862 (1996-04-01), McIntosh
patent: 5729570 (1998-03-01), Magill
patent: 5745528 (1998-04-01), Hikoso et al.
Bocure Tesfaldet
Samsung Electronics Co,. Ltd.
LandOfFree
Spread spectrum communication system for error compensation of c does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Spread spectrum communication system for error compensation of c, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spread spectrum communication system for error compensation of c will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-870450