At least one communication service for transmitting and/or receiving information associated with the communication service utilizes at least one of several antennas in a motor vehicle. An antenna circuit, associated with each of the antennas, converts an analog signal received by the antenna into digital received data associated with that antenna circuit and/or converts digital transmission data associated with that antenna circuit into an analog transmission signal which is supplied to the associated antenna. A communication device in the motor vehicle generates transmission data associated with the antenna circuits in accordance with transmission information and transfers the transmission data to the associated antenna circuit and receives the digital received data from at least one of the antenna circuits to provide reception information based on the digital received data.

An analog processing subsystem is disclosed. Said subsystem comprising at least one antenna (202,302), a duplexer (202a,302a), at least one power amplifier (203a,203b), at least one mixer (204a,204b, 304a, 304b) and an interface connectable to a baseband processing subsystem. The at least one mixer (204a,204b,304a,304b) is adapted to down-convert and inphase/quadratureIQdemodulate a received analog radio frequency signal, received by the at least one antenna (202,302), to provide a received analog baseband signal and to IQ-modulate and up-convert a transmit analog baseband signal, to be transmitted by the at least one antenna (202, 302), to provide a transmit analog radio frequency signal. The analog processing subsystem is comprised on a single analog radio frequency processing chip (201,301) comprising a metallization on at least one side of the chip for integration of the at least one antenna (202,302).

In an embodiment, an apparatus includes: a first receiver to receive and downconvert a first radio frequency (RF) signal to a second frequency signal and to output a first digitized signal, the first receiver comprising a full-band receiver to receive at least a substantial portion of a band of interest; a second receiver to receive and downconvert a second RF signal to a third frequency signal and to output a second digitized signal, the second receiver comprising a narrow-band receiver to receive a first channel of the band of interest; a digital circuit to process at least one of the first and second digitized signals; and a controller to configure the first receiver and the second receiver and control the digital circuit.

Various embodiments relate to a method and apparatus for a method for under sampling a RF carrier signal, the method including receiving, by an analog digital converter, the RF carrier signal, selecting, by a multiplexer, a clock signal which includes a first clock signal and a second clock signal which are phase shifted, receiving, by the ADC, the clock signal which has a frequency less that the frequency of the RF carrier signal, sampling, by the ADC, the RF carrier signal using the selected clock signal and demodulating, by a digital signal processor, the RF carrier signal into I channel data and Q channel data for I/Q demodulation.

An apparatus includes a signal generator. The signal generator includes a voltage controlled oscillator (VCO) coupled to provide an output signal having a frequency. The signal generator further includes an asymmetric divider coupled to receive the output signal of the VCO and to provide an output signal. The output signal of the asymmetric divider has a frequency that is half the frequency of the output signal of the VCO. The asymmetric divider presents a balanced load to the VCO.

A method and apparatus for dynamically modifying filter characteristics of a Delta-Sigma modulator. The system is used for wide bandwidth radio system designed to adapt to various global radio standards and, more particularly, to a cellular radio architecture that employs a combination of a single circulator, programmable band-pass sampling radio frequency (RF) front-end and optimized digital baseband that is capable of supporting all current cellular wireless access protocol frequency bands.

In an embodiment, an apparatus includes: a first receiver to receive and downconvert a first radio frequency (RF) signal to a second frequency signal and to output a first digitized signal, the first receiver comprising a full-band receiver to receive at least a substantial portion of a band of interest; a second receiver to receive and downconvert a second RF signal to a third frequency signal and to output a second digitized signal, the second receiver comprising a narrow-band receiver to receive a first channel of the band of interest; a digital circuit to process at least one of the first and second digitized signals; and a controller to configure the first receiver and the second receiver and control the digital circuit.

A demodulator 100 includes: an AD conversion section 10 that converts a received signal RF in an analogue form to a digital signal; a noise removal section 40 that is connected to a back side of the AD conversion section 10 to detect and remove a noise from an input signal; decimation filters 52 and 54 that are connected to a back side of the noise removal section 40 and reduce a data rate of an input signal; and a demodulation section 60 that is connected to back sides of the decimation filters 52 and 54 and demodulates an input signal. The decimation filters 52 and 54 are connected to the back side of the noise removal section 40, which provides a demodulator less subject to degradation of a signal wave.

A communication system provides reliable wideband communications with reduced power consumption in a user equipment (UE) receiver. A UE may include receiver circuitry to receive a radio frequency (RF) signal from a wireless network and output an analog baseband signal. The RF signal includes M copies of a duplicated signal in a frequency domain. The analog baseband signal includes the M copies of the duplicated signal uniformly offset from one another in the frequency domain by a bandwidth F and including a gap between adjacent copies. The UE further includes an anti-aliasing analog filter an analog to digital converter (ADC). The ADC samples an output of the anti-aliasing analog filter at a sampling frequency selected to obtain a digital baseband signal comprising a combined digital copy of the M copies of the duplicated signal folded over each other.

A hybrid polar I-Q transmitter comprises an I-Q quantization circuit configured to receive an in-phase signal and a quadrature signal forming a first I-Q data pair, and generate a quantized in-phase signal and a quantized quadrature signal forming a second I-Q data pair, respectively, based on a resolution information of a digital-to-analog converter (DAC). Each of the first and second I-Q data pairs corresponds to a point in an I-Q constellation diagram comprising an I axis and a Q axis that are orthogonal to one another. The transmitter further comprises a quantization reduction circuit configured to determine a first rotation angle and a second rotation angle of the I-axis and Q-axis, respectively, based on the first I-Q data pair and the second I-Q data pair, and use the determined first rotation angle and the second rotation angle for generating an RF output signal.