Microchip Technology Inc.

Esmael Heidari

Rahim Bagheri

Masoud Djafari

Mohsen Pourkhaatoun

Kiran Gowda

Hamid Shafiee

Siddharth Shetty

Pancham R Patel

Ali Fard

Various embodiments relate to multi-modulus frequency dividers, devices including the same, and associated methods of operation. A method of operating a multi-modulus divider (MMD) may include receiving, at the MMD, an input signal at a first frequency. The method may also include generating, via the MMD, an output signal at a second, lower frequency based on a divisor value. Further, the method may include receiving, at the MMD, an integer value. Moreover, the method may include setting the divisor value equal to the integer value in response to a current state of the MMD matching a common state for the MMD, wherein the MMD is configured to enter the common state regardless of the divisor value.

Multi-modulus frequency dividers

Embodiments of the present disclosure include an OFDM receiver circuit, which includes an FFT circuit configured to calculate an FFT of a plurality of sample values received by the receiver circuit, and a smoothing circuit configured to identify equalizer coefficients for the sample values by truncating portions of an impulse response of the FFT.

Channel estimation in OFDM communication systems

Various embodiments relate to multi-modulus frequency dividers, devices including the same, and associated methods of operation. A method of operating a multi-modulus divider (MMD) may include determining a common state for the MMD, wherein the MMD is configured to enter the common state regardless of a divisor value applied to the MMD. The method may further include receiving an integer value at the MMD. Further, the method may include setting the divisor value equal to the integer value. The method may also include receiving an input signal at a first frequency and generating an output signal at a second, lower frequency based on the divisor value. The method may also include receiving a second integer value at the MMD. The method may further include setting the divisor value equal to the second integer value in response to a detected current state of the MMD matching the common state for the MMD.

A receiver circuit includes a conversion circuit configured to down-convert a received radio-frequency signal to a baseband signal, an analog-to-digital converter configured to sample the baseband signal into a sampled signal, a Fast Fourier transform (FFT) circuit configured to perform an FFT on the sampled signal, and a digital compensation circuit configured to compensate for IQ distortion in a frequency domain.

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Mission Viejo, CA, United States of America

Esmael Heidari