Commissariat &#xc0; L'&#xc9;nergie Atomique Et Aux &#xc9;nergies Alternatives

Commissariat a L'energie Atomique

Cedric Dehos

Dominique Morche

Alexandre Siligaris

Baudouin Martineau

Laurent Dussopt

Tim Schenk

Jose-Luis Gonzalez Jimenez

Clement Jany

Pierre Vincent

A carrier recovery system for a receiver of a phase-modulated signal N-PSK, the system including a first pre-conditioning circuit of the signal received (S(t)), with the pre-conditioned signal (SP(t)) having a component, non-modulated in phase, at the frequency N&#x192;where &#x192;is the carrier used for the modulation N-PSK, and a carrier regeneration circuit to regenerate two sinusoidal signals in quadrature at the frequency &#x192;, with these signals being phase locked with respect to said non-modulated component in phase of the pre-conditioned signal.

Carrier recovery analog system for a receiver of a N-PSK signal

In the field of millimeter band transmitting/receiving systems for a high-speed contactless transmission, an architecture is provided with a common processing circuit supplying modulation signals and a plurality of transmitting/receiving integrated circuits, all identical to one another, receiving these signals, and also a common clock. The transmitting/receiving integrated circuits each comprise: an oscillator locked with the clock signal to produce a carrier frequency, a transmit channel comprising a first controllable phase shift circuit, a frequency transposition to the carrier frequency, and a power amplifier, a receive channel comprising a low noise amplifier, a frequency transposition from the carrier frequency, and a second controllable phase shift circuit. An antenna is associated with each transmitting/receiving circuit.

Millimeter band transmitting/receiving system

A method for digital compensation of nonlinearities in a communication system that includes a transmitter, a transmission channel and a receiver, including: estimating the nonlinearities induced by the transmitter and/or the receiver, from at least one learning sequence received at the receiver and distorted by the nonlinearities, and compensating for the nonlinearities distorting a signal received at the receiver based on the estimating of the nonlinearities.

Method for the digital compensation of nonlinearities in a communication system and receiver device

The invention concerns a method for the correction of the IQ imbalance of a receiver, in order to obtain a corrected estimate of the IQ imbalance, including:

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Douarnenez, France

Cedric Dehos