baseband (Total 2542 Patents Found)

According to one embodiment, an apparatus includes a digital signal processor configured to perform a multiple antenna detection portion of a baseband signal processing process using a first floating point processing unit, and perform all other portions of the baseband signal processing process using a half-precision f...
A circuit for reducing counter-intermodulation in a modulated signal caused by an oscillator frequency and harmonics of a baseband signal is disclosed. The circuit comprises a first and a second baseband section arranged for generating a first and a second version of a baseband signal, the second version being phase sh...
La présente invention concerne un procédé de synchronisation et de correction de retard entre une unité bande de base et une unité radiofréquence. Sur la base d'une liaison élevée entre une unité de bande de base BBU et une unité radiofréquence RRU, la synchronisation est réalisée entre la BBU et la RR...
The present disclosure relates to an advanced digital baseband processor for a base station in a cellular communications network. In general, the advanced digital baseband processor integrates multiple Radio Access Technologies (RATs). As used herein, a RAT is a radio access technology as defined by a corresponding sta...
Briefly, in accordance with one or more embodiments, a platform may comprise a receiver to receive a signal that includes an error in the received signal due to a noise signal generated in the platform, and a processor configured to calculate a noise vector from a source of the noise signal and to send the noise vector...
The invention provides a delay acquisition method and device, a baseband unit and a communication system. The method comprises the steps of calculating a positive delay of each remote radio unit RRU in a bidirectional ring network link; calculating a negative delay of each RRU in the bidirectional ring network link acc...
A radio unit configured to connect to a baseband processing unit includes a transformation unit configured to obtain uplink time domain signal data and transform the uplink time domain signal data into uplink frequency domain signal data; and a compression unit configured to compress the uplink frequency domain signal ...
Methods, systems and apparatus for modelling a power amplifier and pre-distorter fed by a multi-band signal are disclosed. According to one aspect, a method includes receiving a multi-band signal and generating a discrete base band equivalent, BBE, Volterra series based on the received multi-band signal, where the seri...
Disclosed herein are systems and methods for carrier aggregation and fast network-switching with a single-baseband modem, carrier-aggregation-capable wireless-communication device (WCD). One embodiment takes the form of a system that includes a first RF integrated circuit (RFIC), a second RFIC, a baseband processor cou...
A radio receiver uses the same tuner for receiving a selected digital television (DTV) signal, irrespective of whether it is a quadrature-amplitude-modulation (QAM) or a vestigial sideband (VSB) signal. The final IF signal is digitized at a rate that is a multiple of both the symbol frequencies of the QAM and VSB signa...
A multi-mode receiver includes a channel decomposition module (e.g., a Rake receiver) for separating a received signal into multipath components, an interference selector for selecting interfering paths and subchannels, a synthesizer for synthesizing interference signals from selected subchannel symbol estimates, and a...
The proposed iterative method concurrently calculates maximum likelihood estimated values for the channel coefficients (h 0 , . . . , h L ; θ h ) and the DC offset (d; θ d ) on the basis of a training sequence (TSC) in a TDMA mobile communications system. The SAGE algorithm leads to two recursion formulae, by means o...
La présente invention se rapporte à un procédé adapté pour exécuter une transmission dans la bande de base, sur une porteuse à interface RF. Le procédé selon l'invention consiste : à transformer un signal de service d'un dispositif client de sorte à obtenir un premier signal dans la bande de base, le...
This disclosure relates to techniques for using wireless link information from baseband to trigger application data activity. According to some embodiments, wireless link information from baseband may be received at an application processor of a wireless device. The wireless link information may indicate whether the wi...
In a method to compensate for a step DC disturbance ( 1 ) in a baseband signal in a homodyne radio receiver, the time profile of the step DC disturbance within a burst is determined. In order to produce a step-corrected baseband signal, the determined time profile ( 2 ) is then calculated from the digitized baseband si...
A power control module receives a dynamic power control signal and generates a differential bias signal proportional to the dynamic power control signal. An analog multiplexer receives a digital amplitude signal including n bits and receives the differential bias signal. The analog multiplexer multiplexes the digital a...
A baseband signal switching arrangement for the diversity reception of pulse-modulated microwaves is capable of selecting anyone of respective demodulated baseband digital signals without causing any bit errors in the output. The baseband signal switching arrangement includes a digital signal gate switch for selecting ...
The invention relates to a baseband predistortion system for the adaptive linearization of power amplifiers and to a radiotransmitter using the predistortion system. It is based upon the updating of two error tables, one for the amplitude and one for the phase, whose content is used for correcting the baseband samples....
A radio unit configured to connect to a baseband processing unit includes a transformation unit configured to obtain uplink time domain signal data and transform the uplink time domain signal data into uplink frequency domain signal data; and a compression unit configured to compress the uplink frequency domain signal ...
A digital modulator includes a signal source for a digital baseband signal and a signal source for carrier phase information. The digital baseband signal is converted into amplitude information of an I phase, a Q phase, an I' phase and a Q' phase by a mapping circuit. The carrier phase information is converted ...
For compatible transmission of a television picture having an aspect ratio of 16:9 within a 4:3 system, transmission is effected in the letterbox format in accordance with the PALplus system specification. The receiver reconstructs the original picture with the aid of vertical filters and is able, furthermore, to suppr...
The present invention is an apparatus and method for performing a π/4-DQPSK baseband modulation based on a signal mapping to be simplified. The apparatus mainly comprises a memory unit and as processing unit. The memory unit stores a plurality of parameters and their corresponding tabular data of a low pass filter, an...
Certain aspects of a digital baseband transmitter with digital RF/IF support in GSM/GPRS/EDGE compliant devices may comprise receiving digitized data within a chip. A control signal may be generated within the chip indicating whether the received digitized data is to be processed by an IF processing interface or a digi...
An ultrasound flow measurement system converts each of plural groups of reflection sample values from scatterers, into baseband complex data values and enables a velocity determination from just two lag samples. A cross correlation function derives a first cross-correlation value between a first set of complex data val...
本发明涉及一种数字基带传输系统的ICA应用方法,信道信号形成器将0、1序列的原始信源信号转换成矩形脉冲序列的信源信号,通过信道将数字信号传输给ICA分离器,ICA分离器将检测到的N个混合信号,分离成N个独立信号,再将独立信号传送给...
An embodiment of a baseband filter in a transmitter subsystem of a wireless device comprises an operational amplifier (op-amp), a pole circuit, a feedback capacitor, and an active device. The op-amp is adapted to produce an amplified signal that includes noise gain produced by the op-amp. The pole circuit is electrical...
A baseband modem and method for voice recognition and a mobile communication terminal using the baseband modem and method are disclosed. A speech recognition rate may be increased by selecting a sampling rate suitable for speech recognition and portions of the speech recognition process may be implemented in hardware. ...
A hybrid MIMO RDN 3G/4G receiving system which include M antennas for N MIMO branches, wherein M>N is provided herein. Each branch has a beamformer so that each of the beamformers includes at least one combiner configured to combine signals coming from the antennas coupled to a respective beamformer into a combined ...
A balanced transmitter up-converts a baseband signal directly from baseband-to-RF. The up-conversion process is sufficiently linear that no IF processing is required, even in communications applications that have stringent requirements on spectral growth. In operation, the balanced modulator sub-harmonically samples th...
A multi-protocol wireless communication baseband transceiver includes a baseband transmit processing module and a baseband receive processing module. The baseband transmit processing module includes an encoding module, an interleaving module, a plurality of symbol mapping modules, a plurality of domain conversion modul...
A system and method for tuning baseband filters in wireless transceivers. A method comprises coupling a radio frequency (RF) signal generated by the wireless transmitter at an input of a wireless receiver, the RF signal having a desired frequency, measuring a magnitude of the coupled RF signal at an output of an analog...