Embodiments in accordance with the present disclosure are directed to communications apparatuses and methods thereof that includes a radio frequency (RF) front-end circuitry and RF back-end circuitry. The RF front-end circuit receives sets of RF signals concurrently and as transmitted from at least two disparate communication networks. The front-end circuitry includes a tunable radio having at least one antenna feeding signal conditioning and down conversion circuitry, and decimation circuitry. The decimation circuitry filters and decimates data associated with the RF signals into a plurality of digital data streams. The RF back-end circuitry includes a plurality of digital-signal processors (DSPs) that extract raw data packets from the digital data streams and a microprocessor. The microprocessor transmits the plurality of digital data streams to the plurality of DSPs and transmits the extracted raw data packets, received from the plurality of DSPs, to an end-user device.

In one aspect, an apparatus includes: a mixer to receive a radio frequency (RF) signal and downconvert the RF signal into a second frequency signal; an amplifier coupled to the mixer to amplify the second frequency signal; an image rejection (IR) circuit coupled to the programmable gain amplifier (PGA) to orthogonally correct a gain and a phase of the amplified second frequency signal to output a corrected amplified second frequency signal; and a complex filter to filter the corrected amplified second frequency signal.

A Sigma-Delta () modulator for converting an analog input signal having a frequency bandwidth around a variable center frequency f.sub.0 to a digital output signal at a sampling frequency f.sub.s. The modulator comprises a quantizer (420) for generating the digital output signal and a loop filter for shaping the quantization noise. The loop filter comprises at least one subfilter (430, 410) centered around a frequency f.sub.0 and constant noise shaping coefficients (451, 452, 453). The modulator further comprises a tunable delay element (455), a frequency adjuster (480) for adjusting the sampling frequency f.sub.s such that the normalized center frequency f.sub.0/f.sub.s is constant, and a delay adjuster (490) for adjusting the loop delay t.sub.d implemented by the quantizer and the tunable delay element (455), such that the normalized loop delay t.sub.d/T.sub.s falls in a predetermined range [t.sub.min, t.sub.max], where T.sub.s=1/f.sub.s.

Disclosed in the present invention are a data transmission method, an apparatus and an antenna array, in order to realize wide bandwidth data transmission of massive antenna array. The data transmission method comprises: baseband IQ data of multiple CA is grouped via IR data interface module to obtain baseband IQ data of each CA group; for baseband IQ data of each CA group: the baseband IQ data with enhanced data rate of the CA group is up-converted to digital intermediate frequency band by a digital up-conversion module; the digital intermediate frequency signals of the CA group are superposed by a combiner to form a multi-carrier digital intermediate frequency signal; in accordance with the amplitude and phase requirements of each antenna in a group of antenna sharing the multi-carrier digital intermediate frequency signal, the amplitude and phase of the multi-carrier digital intermediate frequency signal are respectively adjusted and transmitted to a digital to analog converter of a corresponding antenna channel; a multi-carrier analog intermediate frequency signal is generated by the digital to analog converter of each antenna channel, and then is transmitted to the corresponding antenna channel.

System and methods for generating and employing coherent multicarrier correlation can include receiving, from a transmitter, a plurality of radio frequency (RF) signals associated with a respective plurality of nominal carrier components. A processing circuitry can remove from each received RF signal the respective nominal carrier component to generate a corresponding baseband signal. The processing circuitry can generate, for each baseband signal, a respective correlation signal using the baseband signal and a reference signal. The processing circuitry can incorporate, to each correlation signal, the respective nominal carrier component of the RF signal associated with that correlation signal to generate a respective single-carrier correlation signal. The processing circuitry can aggregate the single-carrier correlation signals to generate a multi-carrier correlation signal. The processing circuitry can determine one or more attributes of the transmitter or the received RF signals based on the generated multi-carrier correlation signal.

Various embodiments relate to a method and apparatus for over sampling a RF carrier signal, the method including receiving, by an ADC, the RF carrier signal, sampling, by the ADC, the RF carrier signal using the selected clock signal which is at least quadruple the RF carrier signal, down sampling, by a RF-DSP, the RF carrier signal by a factor of two to generate I channel data and Q channel data, mixing down, by the RF-DSP, the I channel data and the Q channel data, and outputting, by the RF-DSP, the I channel data and Q channel data to a baseband DSP.

Embodiments of the present invention may provide a receiver. The receiver may include an RF section, a local oscillation signal generator to generate quadrature local oscillation signals, and a quadrature mixture, coupled to the RF section, to downconvert a first group of wireless signals directly to baseband frequency quadrature signals and to downconvert a second group of wireless signals to intermediate frequency quadrature signals. The receiver may also include a pair of analog-to-digital converters (ADCs) to convert the downconverted quadrature signals to corresponding digital quadrature signals. Further, the receiver may include a digital section having two paths to perform signal processing on the digital baseband frequency quadrature signals and to downconvert the digital intermediate frequency signals to baseband cancelling a third order harmonic distortion therein. Moreover, the receiver may include a phase corrector to adjust a phase of one of the local oscillation signals to balance the third order harmonic distortion and a gain offset generator to adjust a gain of one of the downconverted signals to balance the third order harmonic distortion.

Disclosed in the present invention are a data transmission method, an apparatus and an antenna array, in order to realize wide bandwidth data transmission of massive antenna array. The data transmission method comprises: baseband IQ data of multiple CA is grouped via IR data interface module to obtain baseband IQ data of each CA group; for baseband IQ data of each CA group: the baseband IQ data with enhanced data rate of the CA group is up-converted to digital intermediate frequency band by a digital up-conversion module; the digital intermediate frequency signals of the CA group are superposed by a combiner to form a multi-carrier digital intermediate frequency signal; in accordance with the amplitude and phase requirements of each antenna in a group of antenna sharing the multi-carrier digital intermediate frequency signal, the amplitude and phase of the multi-carrier digital intermediate frequency signal are respectively adjusted and transmitted to a digital to analog converter of a corresponding antenna channel; a multi-carrier analog intermediate frequency signal is generated by the digital to analog converter of each antenna channel, and then is transmitted to the corresponding antenna channel.

The present application relates to a receiver for performing a decimation on a signal for pattern detection and a method of operating thereof. A frequency-domain decimator component and a pattern detector component arranged at the receiver are provided. The frequency-domain decimator component is coupled to at least one antenna to receive an input sequence of samples of the signal received at the at least one antenna. The frequency-domain decimator component is further configured to apply an anti-aliasing filter and to decimate the input sequence. The frequency-domain decimator component is further arranged to output the input sequence filtered and decimated as output sequence. The pattern detector component is coupled to the frequency-domain decimator component to receive the output sequence. The pattern detection component is further configured to perform a pattern detection based on cross-correlation values in frequency domain between the output sequence and predefined patterns.

In one aspect, an apparatus includes: a mixer to receive a radio frequency (RF) signal and downconvert the RF signal into a second frequency signal; an amplifier coupled to the mixer to amplify the second frequency signal; an image rejection (IR) circuit coupled to the programmable gain amplifier (PGA) to orthogonally correct a gain and a phase of the amplified second frequency signal to output a corrected amplified second frequency signal; and a complex filter to filter the corrected amplified second frequency signal.