Maxim Integrated Products, Inc.

Mohammad Javad Omidi

Hossein Alavi

Ahmad Chini

Mehdi Tavassoli Kilani

Mohammad Reza Movadhedin

In one embodiment, a system and method for receiving information over a power line in accordance with the HomePlug specification is described. The receiver side of the method involves separation of the data within a payload of an incoming frame into a plurality of blocks. Thereafter, both frame control symbols and data within the blocks are processed by Frame Control Forward Error Correction (FEC) decoding logic.

Apparatus and method for a low-rate data transmission mode over a power line

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.

Blind channel estimation and data detection for PSK OFDM-based receivers

A method and apparatus for time-shift extraction in a wideband transmitted signal containing strong narrowband interference or noise. The time-shift extraction is based on the time domain and frequency domain relation of symbol misalignment. The invention uses the sign of the product of a recieved signal sample and a reference symbol in the frequency domain to determine the time-shift. It does not rely on the signal magnitude and is therefore less dependent on the signal gain. It also does not rely on the soft phase values, which have ambiguity for values more than three hundred sixty (360) degrees.

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Mississauga, Canada

Mohammad Javad Omidi