Sequans

About: Sequans is a company organization based out in Reading, United Kingdom. It is known for research contribution in the topics: Communication channel & MIMO. The organization has 73 authors who have published 126 publications receiving 1066 citations.

Dynamic amplifier supply

Abstract: A method of providing a power supply of an amplifier of a wireless transmission system comprising, determining the power at an antenna when transmitting a signal to be transmitted by the amplifier, determining the modulation scheme for transmitting the signal, determining the frequency allocation of the signal to be transmitted, determining a transmit channel characteristic, and adjusting a parameter of the power supply of the amplifier based on the determining steps to maintain amplifier linearity.

Enhanced spatial modulation

Abstract: A method of transmitting data comprising choosing a transmit modulation scheme of the transmission, choosing a transmit parameter of the transmission, transmitting the data stream according to the chosen transmit modulation and transmit parameter such that data of the data stream is transmitted by the modulation scheme and the choice of transmit parameter.

Advanced interference management in ARTIST4G: Interference exploitation

Abstract: This paper gives an overview of the objectives and current research activities on interference exploitation in the EC funded research project ARTIST4G. Focus is on channel estimation and multi-cell joint processing. First field trial results for different cooperation schemes are provided.

Channel estimation method

Abstract: A channel estimating method is provided for a signal transmitted in an orthogonal frequency division multiplexing (OFDM) system, wherein an OFDM symbol of the signal has at least one null subcarrier set in its defined bandwidth. The method includes: obtaining at least one initial channel estimate over at least one OFDM symbol of a received signal; processing the at least one initial channel estimate for delivering at least one soft information in a form of a complete matrix; and updating the at least one initial channel estimate by performing a truncated singular value decomposition of a partial FFT matrix. The partial FFT matrix includes only the first L DP columns and the rows N DP of an FFT matrix of the complete matrix, the N DP rows corresponding to modulated subcarriers of received signal, including data and pilot symbols and excluding the at least one null subcarrier, delivering an improved channel estimate.

Device for simulating MIMO environment

Abstract: The invention relates to a device which comprises a plurality of input ports for accepting corresponding input RF signals corresponding to a plurality of transmitting antenna elements and a plurality of output ports for generating coherent output signals to a corresponding plurality of receiving antenna elements, whereby the output ports and the input ports are interconnected by a module comprising a network of interconnected hybrid elements. According to the invention, said module further comprises at least one attenuator being connected to at least one input and or output of at least one of hybrid element of said network of hybrid elements.