Title :
Threshold synchronization of the adaptive interference reduction scheme in low complexity digital direct-sequence spread-spectrum receivers
Author :
Goiser, Alois M J
Author_Institution :
Inst. fur Allgemeine Elektrotech. und Elektronik, Tech. Univ. Wien, Austria
Abstract :
It is well known that for low complexity digital direct-sequence spread-spectrum receivers in deterministic kinds of interferences an unacceptable loss in signal-to-interference ratio occur. To overcome this, a new interference reduction scheme was presented and analyzed by Goiser (see Proc. IEEE-Milcom´96, 1996) for stationary conditions. This paper focuses on the dynamic of the adaptive interference reduction scheme and presents its suitability for the proposed receiver of Goiser. The paper covers the new synchronization scheme using an opening and closing window-technique to acquire the optimum threshold location. The additional absorbing-function makes these threshold synchronization technique very fast. The mean synchronization time for pulsed combined interference is presented
Keywords :
adaptive signal processing; digital radio; interference suppression; radio receivers; spread spectrum communication; synchronisation; DS-SS; absorbing-function; adaptive interference reduction; closing window-technique; deterministic interference; digital direct-sequence spread-spectrum receivers; low complexity receivers; mean synchronization time; opening window-technique; optimum threshold location; pulsed combined interference; signal-to-interference ratio; stationary conditions; threshold synchronization; AWGN; Adaptive signal processing; Additive white noise; Baseband; Interference; Narrowband; Programmable control; Signal processing; Spread spectrum communication; Wideband;
Conference_Titel :
MILCOM 97 Proceedings
Conference_Location :
Monterey, CA
Print_ISBN :
0-7803-4249-6
DOI :
10.1109/MILCOM.1997.648671
