[특허]System and method for estimating the multi-path delays in a signal using a spatially blind antenna array

[미국특허] System and method for estimating the multi-path delays in a signal using a spatially blind antenna array 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04B-017/00
출원번호	UP-0078471 (2008-03-31)
등록번호	US-7778608 (2010-09-06)
발명자 / 주소	Kennedy, Jr., Joseph P. Carlson, John P. Alles, Martin
출원인 / 주소	Andrew LLC
대리인 / 주소	Duane Morris, LLP
인용정보	피인용 횟수 : 1 인용 특허 : 32

초록 ▼

A method is described that enables a system to estimate the individual times of arrival of multi-path signals components in a received signal while blind to the particular angular response characteristics of an antenna array. Additionally, a system is described that estimates the impulse response of the modulation channel. The impulse response is used to generate impulse response estimates for all multi-path signal components without reference to the actual angle of arrival of the signal. The impulse responses for the multi-path constituents are directly associated with the time delays on each path, providing delay estimates for each path.

대표청구항 ▼

What we claim is: 1. In a method for estimating the multi-path delays in a signal received at an antenna array of k antenna elements, comprising estimating an impulse response at each k antenna, generating a space-time impulse response, forming a covariance matrix and resolving the covariance matrix with a known antenna array manifold, the improvement comprising the step of resolving the covariance matrix with a fictitious antenna array manifold. 2. The method of claim 1 wherein the covariance matrix “C” is generated according to the following equation: C=ΣIIH. 3. The method of claim 1, wherein the fictitious array manifold is used to form a space-time manifold and the space-time manifold operates to resolve the multi-path delays. 4. The method of claim 1 wherein the step of resolving the covariance matrix C to determine multi-path delays uses the method of MUltiple SIgnal Classification (MUSIC) techniques. 5. The method of claim 1 wherein the step of resolving the covariance matrix C to determine multi-path delays uses the Method of Alternating Projection (APM). 6. The method of claim 1, wherein the space-time impulse response “I” is formed by stacking individual impulse response estimates into a column vector. 7. The method of claim 1, wherein the fictitious manifold is the aggregate of all vectors: a = [ a 1 a 2 ⋮ a m ] , where ak (k=1, 2, . . . m) range over the set of complex numbers, where m is the number of an antenna element in the array. 8. The method of claim 1, wherein the step of resolving the covariance matrix C to determine multi-path delays uses Alternating Projection.

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[미국특허] System and method for estimating the multi-path delays in a signal using a spatially blind antenna array 원문보기