Koninklijke Philips Corporation N.V.

Nxp B.v.

Luigi Agarossi

Sandro Bellini

Stefano Tomasin

Nevio Benvenuto

Luca Giangaspero

Fabrizio Bregoli

Morena Minto

Diego Ragazzi

Pierangelo Migliorati

A fast Fourier transformation is performed on a first vector of signals, and as a result a second vector of signals is provided. A feed forward equalization is performed by multiplying each of the components of said second vector with equalization parameters, and as a result a third vector of signals is provided. An inverse fast Fourier transformation is performed on said third vector, and as a result a fourth vector of signals is provided. An output signal of said first section is provided on the basis of said fourth vector of signals. In a second section a signal derived from an output signal of said second section is is filtered via linear feedback filtering and the filtered signal is added to said first section output signal, and an added signal is provided, and said second section output signal is generated by extracting samples from said added signal.

Frequency-domain decision feedback equalizing device and method

A method for minimizing processing and transmission power in a flexible and bidirectional OFDM wireless communication system including a MAC layer and a PHY layer, said PHY layer including a supervisor unit controlling in real time the performance of the PHY layer is disclosed. The method comprises feeding a first set of input data as to the QoS requirements at the PHY layer from the MAC layer to the supervisor unit comprising a Target Rate (required information rate), a Target BER (required Bit Error Rate) and a Max Delay (max tolerable delay); feeding a second set of input data including channel power transfer functions H=(|Hi|2(: (index i refers to the ith sub-carrier) from PHY layer to the supervisor unit; processing the first and second set of input data for minimizing processing and transmission power in a wireless communication network system; and outputting N, modulation and coding parameters and transmission power parameters to the PHY layer. The coding parameters and transmission power parameters to the PHY layer include C: Code rate data; B: Block length data; n: data as to the number of decoding iterations; M=(Mi(: data as to a set of codes to specify the generally different constellations adopted for the different sub-channels (e.g. Mi=0 means that the ith sub-channel is OFF, different values specify constellation types in the pre-defined available set); and P=(Pi(: data as to a set of the generally different transmission powers adopted for the different sub-channels (e.g. Pi=0 means that the ith sub-channel is OFF). The method is performed in a wireless communication system, in particular in a supervisor unit.

Transmission power optimization of OFDM wireless communication system

Maximum Likelihood Sequence Estimation (MLSE) is performed on a received signal that is affected by non-linear distortion. In particular, a cleaned signal is produced by removing non-linear inter-symbol-interference (ISI) through a Volterra canceller which is a simplified structure with respect to a Volterra Equalizer. The latter only processes the non-linear distortion. Finally, a Viterbi Detector is used to process the cleaned signal in the manner of a linear signal, and to estimate appropriate metrics accordingly.

Method and device for nonlinear maximum likelihood sequence estimation by removing non-linear inter-symbol-interference (ISI) from a received signal

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Concorezzo, Italy

Luigi Agarossi