Title :
Wideband array processing using a two-sided correlation transformation
Author :
Valaee, Shahrokh ; Kabal, Peter
Author_Institution :
Dept. of Electr. Eng., McGill Univ., Montreal, Que., Canada
fDate :
1/1/1995 12:00:00 AM
Abstract :
A new method for broadband array processing is proposed. The method is based on unitary transformation of the signal subspaces. We apply a two-sided transformation on the correlation matrices of the array. It is shown that the two-sided correlation transformation (TCT) has a smaller subspace fitting error than the coherent signal-subspace method (CSM). It is also shown that unlike CSM, the TCT algorithm can generate unbiased estimates of the directions-of-arrival, regardless of the bandwidth of the signals. The capability of the TCT and CSM methods for resolving two closely spaced sources is compared. The resolution threshold for the new technique is much smaller than that for CSM
Keywords :
array signal processing; correlation methods; direction-of-arrival estimation; matrix algebra; DOA estimation; broadband array processing; closely spaced sources; coherent signal-subspace method; correlation matrices; directions-of-arrival; resolution threshold; signal subspaces; subspace fitting error; two-sided correlation transformation; unitary transformation; wideband array processing; Array signal processing; Bandwidth; Delay; Frequency; Narrowband; Signal generators; Signal processing; Signal resolution; Signal to noise ratio; Wideband;
Journal_Title :
Signal Processing, IEEE Transactions on
