Title :
A scheme for further strengthening interference protections of spread spectrum communication systems
Author :
Yunchun, Shen ; Tou, C.
Author_Institution :
Harbin Shipbuilding Eng. Inst., Heilongjang, China
Abstract :
The distinct features of the proposed scheme are the use of: a hybrid direct-sequence/frequency-hopping (DS/FH) system to increase processing gain; a tunable microwave bandpass filter to reduce overall bandwidth; a low-noise wideband amplifier to reduce the noise figure and increase sensitivity; a soft limiter to cope with strong CW interference without causing intermodulation problems. A DS/FH hybrid system has been employed in the proposed scheme so that a much higher processing gain than that of a single DS or FH system can be achieved without technical difficulties
Keywords :
frequency agility; radiofrequency interference; spread spectrum communication; AGC; CW interference; DS/FH hybrid system; antijamming performance; bandwidth; direct-sequence/frequency-hopping; interference protection; low-noise wideband amplifier; noise figure; processing gain; sensitivity; soft limiter; spread spectrum communication systems; tunable microwave bandpass filter; Additive white noise; Bandwidth; Error probability; Frequency; Gaussian noise; Interference; Jamming; Protection; Spread spectrum communication; Working environment noise;
Conference_Titel :
Electromagnetic Compatibility, 1990. Symposium Record., 1990 IEEE International Symposium on
Conference_Location :
Washington, DC
Print_ISBN :
0-7803-7264-6
DOI :
10.1109/ISEMC.1990.252825
