Blind channel estimation and data detection for PSK...

Pulse or digital communications – Receivers – Angle modulation

Reexamination Certificate

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Details

C375S372000, C375S260000, C329S304000

Reexamination Certificate

active

06983029

ABSTRACT:
In general, one embodiment of the invention relates to a method for detecting data bits and estimating the channel reliability of each carrier. The detection method comprises (i) computing a complex phase difference between a current symbol and a previous symbol, (ii) separating a real value component (R) from a corresponding imaginary value component (I) forming the complex phase difference, (iii) determining at least one boundary constraint line of a complex phase map for a selected demodulation scheme, and computing an arithmetic combination of the real value component and the corresponding imaginary value component to detect whether a series of bits falls within a selected region of the complex phase map defined by the at least one boundary constraint line. Over N symbols propagating over a carrier, including the current symbol and the previous symbol, the channel estimation counts a number of symbols (less than N but greater than a threshold) that fall within an estimated area of the complex phase map. The estimated area is bound by boundary constraint lines based on a parameterized real value component.

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Porath, J-E, et al., “Improved Technique for Quick Error Rate Estimation of Multi-Dimensional Communications Schemes” IEE Proceedings: Communications, Institution of Electrical Engineers, GB, vol. 146, NR. 6, Page(s) 343-346, XP006013250, ISSN: 1350-2425.

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