There is described a method of determining an MRC coefficient vector for a RAKE receiver. The method comprises (a) estimating a channel impulse response vector, (b) estimating a noise variance vector, (c) calculating a multiplication factor vector based on the estimated channel impulse response vector and the estimated noise variance vector, (d) calculating a modified channel impulse response vector by multiplying each element in the estimated channel response vector with a corresponding element in the multiplication factor vector, and (e) calculating the MRC coefficient vector as the complex conjugate of the modified channel impulse response vector. There is also described a corresponding device, an UWB receiver, a computer program and a computer program product.

A method for correcting RDS demodulation in a vehicle radio system including a digital core with an RDS demodulation block, a numerically controlled oscillator, a digital mixer that mixes the input signals with the output of the numerically controlled oscillator, a low-pass filter for recovering baseband RDS signals including a sequence of symbols, and a phase-estimating block configured to estimate a phase deviation of the baseband signal. The method including a first correction acting, depending on the estimation of the phase deviation of the baseband signal, on a phase equalizer, downstream of the low-pass filter, in order to cancel out the phase deviation, and optionally a second correction forming a feedback loop and acting on the numerically controlled oscillator depending on the drift in the phase deviations of the baseband signal.

A method for correcting RDS demodulation in a vehicle radio system including a digital core with an RDS demodulation block, a numerically controlled oscillator, a digital mixer that mixes the input signals with the output of the numerically controlled oscillator, a low-pass filter for recovering baseband RDS signals including a sequence of symbols, and a phase-estimating block configured to estimate a phase deviation of the baseband signal. The method including a first correction acting, depending on the estimation of the phase deviation of the baseband signal, on a phase equalizer, downstream of the low-pass filter, in order to cancel out the phase deviation, and optionally a second correction forming a feedback loop and acting on the numerically controlled oscillator depending on the drift in the phase deviations of the baseband signal.

A method (200) for mitigating interference includes: receiving (201) a first signal (y.sub.1) comprising a first plurality of multipath transmissions from at least one radio cell at a first antenna port (A) and a second signal (y.sub.2) comprising a second plurality of multipath transmissions from the at least one radio cell at a second antenna port (B); generating (202) a first spatial component (h.sub.1A) of a first channel coefficient (h.sub.1) based on the first signal (y.sub.1) and a second spatial component (h.sub.1B) of the first channel coefficient (h.sub.1) based on the second signal (y.sub.2); generating (203) a covariance measure (R.sub.y) based on the first signal (y.sub.1) and the second signal (y.sub.2); and generating (204) a first spatial component (w.sub.1A) of a first weight (w.sub.1) for interference mitigation based on the covariance measure (R.sub.y), the first and second spatial components (h.sub.1A, h.sub.1B) of the first channel coefficient (h.sub.1) and a scalar correction value (C).

A method for correcting RDS demodulation in a vehicle radio system including a digital core with an RDS demodulation block, a numerically controlled oscillator, a digital mixer that mixes the input signals with the output of the numerically controlled oscillator, a low-pass filter for recovering baseband RDS signals including a sequence of symbols, and a phase-estimating block configured to estimate a phase deviation of the baseband signal. The method including a first correction acting, depending on the estimation of the phase deviation of the baseband signal, on a phase equalizer, downstream of the low-pass filter, in order to cancel out the phase deviation, and optionally a second correction forming a feedback loop and acting on the numerically controlled oscillator depending on the drift in the phase deviations of the baseband signal.

A method for correcting RDS demodulation in a vehicle radio system including a digital core with an RDS demodulation block, a numerically controlled oscillator, a digital mixer that mixes the input signals with the output of the numerically controlled oscillator, a low-pass filter for recovering baseband RDS signals including a sequence of symbols, and a phase-estimating block configured to estimate a phase deviation of the baseband signal. The method including a first correction acting, depending on the estimation of the phase deviation of the baseband signal, on a phase equalizer, downstream of the low-pass filter, in order to cancel out the phase deviation, and optionally a second correction forming a feedback loop and acting on the numerically controlled oscillator depending on the drift in the phase deviations of the baseband signal.

A method and a transmitter providing magnitude and phase adjustment for high output power radio frequency (RF) power amplifier (PA) combining are provided. According to one aspect, a method includes making adjustments to the magnitude and phase of a received signal to produce first and second amplifier input signals. The method also includes amplifying a respective one of the first and second amplifier input signals via respective first and second power amplifiers. The method further includes combining outputs from each of the first and second power amplifiers to produce a first transmit signal, and to produce an isolation signal indicative of an amount by which the outputs from the first and second power amplifiers differ in magnitude and phase. The isolation signal is used to adjust the received signal to drive the isolation signal toward zero.

A method and a transmitter providing magnitude and phase adjustment for high output power radio frequency (RF) power amplifier (PA) combining are provided. According to one aspect, a method includes making adjustments to the magnitude and phase of a received signal to produce first and second amplifier input signals. The method also includes amplifying a respective one of the first and second amplifier input signals via respective first and second power amplifiers. The method further includes combining outputs from each of the first and second power amplifiers to produce a first transmit signal, and to produce an isolation signal indicative of an amount by which the outputs from the first and second power amplifiers differ in magnitude and phase. The isolation signal is used to adjust the received signal to drive the isolation signal toward zero.

This invention teaches to the details of an interference suppressing receiver for suppressing intra-cell and inter-cell interference in coded, multiple-access, spread spectrum transmissions that propagate through frequency selective communication channels to a multiplicity of receive antennas. The receiver is designed or adapted through the repeated use of symbol-estimate weighting, subtractive suppression with a stabilizing step-size, and mixed-decision symbol estimates. Receiver embodiments may be designed, adapted, and implemented explicitly in software or programmed hardware, or implicitly in standard RAKE-based hardware either within the RAKE (i.e., at the finger level) or outside the RAKE (i.e., at the user or subchannel symbol level). Embodiments may be employed in user equipment on the forward link or in a base station on the reverse link. It may be adapted to general signal processing applications where a signal is to be extracted from interference.

This invention teaches to the details of an interference suppressing receiver for suppressing intra-cell and inter-cell interference in coded, multiple-access, spread spectrum transmissions that propagate through frequency selective communication channels to a multiplicity of receive antennas. The receiver is designed or adapted through the repeated use of symbol-estimate weighting, subtractive suppression with a stabilizing step-size, and mixed-decision symbol estimates. Receiver embodiments may be designed, adapted, and implemented explicitly in software or programmed hardware, or implicitly in standard RAKE-based hardware either within the RAKE (i.e., at the finger level) or outside the RAKE (i.e., at the user or subchannel symbol level). Embodiments may be employed in user equipment on the forward link or in a base station on the reverse link. It may be adapted to general signal processing applications where a signal is to be extracted from interference.