A method of designing a digital filter for example for use in an FBMC/OQAM telecommunications system, with a target overlapping factor and meeting a specified signal to interference ratio is described, whereby a candidate filter design defined by an impulse response, satisfying the Nyquist criterion and having an overlapping factor higher than the target is selected, and the time and frequency coefficients of its impulse response inverted to define a new filter design; and truncating the impulse response defining said new filter design to the minimum number of coefficients achieving said specified signal to interference ratio.

In a wireless communication system, a receiver comprises an Orthogonal Frequency Division Multiplexing (OFDM) demodulator configured to demodulate a spread-OFDM signal transmitted from a user equipment (UE) to produce demodulated data symbols corresponding to OFDM subcarriers assigned to the UE. A discrete Fourier transform (DFT)-based despreader is configured to despread the demodulated data symbols to produce estimates of original data symbols, wherein the despreader employs a DFT despreading code corresponding to a DFT spreading code employed by the UE to shape the spread-OFDM signal into a plurality of uniformly spaced pulse waveforms modulated with the original data symbols. A frequency-domain equalizer may be provided to equalize and/or spatial deumultiplex the demodulated data symbols before despreading.

In a radio receiver, digital baseband signals are processed by a time-domain-to-frequency-domain converter to generate frequency-domain symbols. A blind-adaptive decoder processes the frequency-domain symbols to produce estimates of transmitted data symbols. Frequency-domain equalization may be performed prior to the blind-adaptive decoder performing at least one of blind-adaptive decoding and partially blind adaptive decoding based on information about the transmitted data symbols. The blind-adaptive decoder comprises a combiner that combines the frequency-domain symbols to produce the estimates of the transmitted data symbols.

A receiver receives a multicarrier signal from a wireless communication network and determines subcarrier values of the multicarrier signal. A decoder decodes the subcarrier values to produce a set of data symbols. The multicarrier signal is characterized by a set of modulated pulse waveforms, which results from a sum of the subcarriers. Each of the modulated pulse waveforms has a different time offset. The decoder employs a set of codes for decoding the baseband signal, wherein each code comprises a different linearly increasing phase. Each of the linearly increasing phases corresponds to one of the different time offsets.

A cooperative multi-user multiple input, multiple output (MIMO) antenna array comprises a MIMO subspace processing system communicatively coupled by a first network to a first set of antennas residing on multiple geographically distributed wireless terminals in a mobile radio network. The first set of antennas is updated to produce a second set of antennas, and the first network is reconfigured to connect the MIMO subspace processing system to the second set of antennas. MIMO subspace processing is reconfigured to employ channel state information for the second set of antennas to generate a plurality of non-interfering subspace channels occupying a common frequency in the mobile radio network.

A cooperative multi-user multiple input, multiple output (MIMO) antenna array comprises a MIMO subspace processing system communicatively coupled to a set of antennas residing on multiple ones of a plurality of geographically distributed wireless terminals in a Mobile Radio Network. The MIMO subspace processing system can comprise a distributed computing system. The MIMO antenna array is adapted by updating the set of antennas to produce a second set of antennas; selecting an updated set of distributed computing resources, if necessary, to perform MIMO subspace processing; and reconfiguring the MIMO subspace processing to employ channel state information of the second set to enable multiple non-interfering subspace channels occupying a common frequency.

Methods and apparatuses for UE initiated reporting in a wireless communication system. A method of operating a UE includes: transmitting UE capability information supporting a FTN; generating data modulation symbols including a set of zero symbols, wherein the data modulation symbols are up-sampled or zero-padded; performing, to obtain DFT output signal, a DFT spread operation on the up-sampled or the zero-padded data modulation symbols; performing, based on a target FTN compression rate and a SC allocation, a discarding or a down sampling operation on the DFT output signal, wherein the discarding or the down sampling operation generates a subset of DFT symbols; mapping the subset of DFT symbols to a set of SCs; and performing an IFFT operation on the subset of DFT symbols to obtain an FTN-DFT-S-OFDM signal including the target FTN compression rate comprising a positive rational number smaller than one.

A cooperative multi-user multiple input, multiple output (MIMO) antenna array comprises a MIMO subspace processing system communicatively coupled to a set of antennas residing on multiple ones of a plurality of geographically distributed wireless terminals in a Mobile Radio Network. The MIMO subspace processing system can comprise a distributed computing system. The MIMO antenna array is adapted by updating the set of antennas to produce a second set of antennas; selecting an updated set of distributed computing resources, if necessary, to perform MIMO subspace processing; and reconfiguring the MIMO subspace processing to employ channel state information of the second set to enable multiple non-interfering subspace channels occupying a common frequency.

In a multi-user communication system, a pre-coder in a transmitter comprises a Discrete Fourier Transform (DFT) spreader configured to spread data symbols with Fourier coefficients to generate DFT-spread data symbols. An OFDM modulator, such as an inverse-DFT, modulates the DFT-spread data symbols onto OFDM subcarriers to produce a pre-coded OFDM transmission signal. The DFT spreader is configured to reduce the transmission signal's peak to average power.

In a wireless communication system, a receiver comprises an Orthogonal Frequency Division Multiplexing (OFDM) demodulator configured to demodulate a spread-OFDM signal transmitted from a user equipment (UE) to produce demodulated data symbols corresponding to OFDM subcarriers assigned to the UE. A discrete Fourier transform (DFT)-based despreader is configured to despread the demodulated data symbols to produce estimates of original data symbols, wherein the despreader employs a DFT despreading code corresponding to a DFT spreading code employed by the UE to shape the spread-OFDM signal into a plurality of uniformly spaced pulse waveforms modulated with the original data symbols. A frequency-domain equalizer may be provided to equalize and/or spatial deumultiplex the demodulated data symbols before despreading.