Title :
Quadratic decorrelation receiver for unresolved multipath fading channels
Author :
Danilo, F. ; Leib, Hurry
Author_Institution :
Dept. of Electr. Eng., McGill Univ., Montreal, Que., Canada
Abstract :
We derive suboptimal noncoherent detection structures for multipath fading channels when the multipath delays are assumed to be known but unresolved. The quadratic decorrelation receiver (QDR), a structure that is derived from fundamental principles, consists of an orthogonalization (or decorrelation) stage and then implements a resolved multipath channel decision rule. Single pulse performance over two paths Rayleigh and two paths mixed mode Ricean/Rayleigh fading channels for binary DPSK and binary FSK respectively are considered. This paper shows that it is possible to have diversity-like gains over multipath fading channels with unresolved components even if the channel is not fully tracked. The decorrelation stage of the receiver is crucial for improving performance when the multipath is unresolved
Keywords :
Rayleigh channels; Rician channels; decision theory; delays; differential phase shift keying; fading; frequency shift keying; multipath channels; radio receivers; radiowave propagation; signal detection; Rayleigh channel; binary DPSK; binary FSK; decorrelation stage; diversity-like gains; mixed mode Ricean/Rayleigh fading channels; multipath channel decision rule; multipath delays; orthogonalization stage; performance; quadratic decorrelation receiver; single pulse performance; suboptimal noncoherent detection structures; unresolved components; unresolved multipath fading channels; Additive noise; Covariance matrix; Decorrelation; Delay; Eigenvalues and eigenfunctions; Fading; Gaussian noise; Gaussian processes; Random variables; Signal processing;
Conference_Titel :
Electrical and Computer Engineering, 1995. Canadian Conference on
Conference_Location :
Montreal, Que.
Print_ISBN :
0-7803-2766-7
DOI :
10.1109/CCECE.1995.528119
