Abstract:
A method for processing at least one polarization type of at least one wireless signal by a communication unit operably couplable to an antenna arrangement that comprises at least two orthogonally polarized antenna elements. The method comprises processing at least one signal radiated by at least one first antenna element of the antenna arrangement; and processing the at least one signal where processing comprises at least applying at least one digital complex scaling operation on the at least one signal radiated by at least one second antenna element of orthogonal polarization to the at least one first antenna element of the antenna arrangement thereby radiating at least one wireless signal of at least one non-native polarization type.
Abstract:
A wireless communication system comprises a network element (315) operably coupled to an antenna array for communicating with a remote wireless communication unit (305). The antenna array comprises a plurality of radiating elements where at least one first radiating element of the plurality of radiating elements is arranged to create a radiation pattern that comprises a sector beam (405). The plurality of radiating elements comprises at least one second radiating element arranged to create a major portion of at least one sub-sector beam (420, 425, 430) within the sector beam (405).
Abstract:
A method for calibrating (700) an antenna array comprises a plurality of antenna elements coupled to a plurality of respective receive paths in a wireless communication system. The method comprises, in receive mode, applying a test signal to an individual single receive path (715) of the plurality of receive paths; and feeding back the test signal via a switched coupler network. The method further comprises running a receive calibration measurement routine to determine at least one measurement value used to calibrate the individual signal receive path and waiting for at least one converged measurement value; and extracting (720) the converged measurement value for at least one individual receive path. The steps of applying, running, extracting for a next individual single receive path are repeated until the calibration routine has completed (725). The method further comprises selecting a converged measurement value of at least one individual receive path from a plurality of receive paths (730) to form a reference receiver calibration result (730); normalizing a plurality of at least one measurement values of the plurality of receive paths using the reference receiver calibration result (730); and applying a normalized value to at least one of the plurality of receive paths.
Abstract:
A network element for a wireless communication system is locatable to couple at least one base station to an antenna array. The network element comprises at least one receiver arranged to receive a radio frequency signal from the at least one base station or the antenna array and modem logic operably coupled to the at least one receiver. The modem logic comprises radio frequency conversion circuitry arranged to down-convert a received radio frequency signal to a baseband signal; analogue-to-digital conversion logic arranged to convert the baseband signal to digitized signals; and beam-form processing logic arranged to perform active beam-forming adjustment on the digitized signals. The modem logic further comprises digital-to-analogue conversion logic arranged to convert the beam-form adjusted digitized signals to analogue signals and radio frequency conversion circuitry arranged to up-convert the analogue signals to a radio frequency radio signal for forwarding to the antenna array or the at least one base station.
Abstract:
Receiver circuitry for processing a received Very Low Intermediate Frequency signal wherein the receiver circuitry comprises a main processing path. The main processing path comprises mixing circuitry arranged to mix a received VLIF signal with a frequency down conversion signal to produce a main path signal. The receiver circuitry further comprises a direct current cancellation path comprising mixing circuitry arranged to mix a DC element of the received VLIF signal with the frequency down conversion signal to produce a DC cancellation signal. The receiver circuitry still further comprises signal summing circuitry arranged to add the DC cancellation signal in anti-phase with the main path signal.
Abstract:
A method of processing location information on a mobile device which includes a primary receiver for receiving a primary signal; a diversity receiver for receiving a diversity signal or location information; a diversity combiner which can combine primary and diversity signals to form a combined signal; and a first processing unit for processing the combined signal; the method comprising the steps of: identifying whether the device is in a location mode or a diversity mode; if the device is in location mode, disabling the diversity combiner; passing the output from the primary receiver directly to the first processing unit; and passing location information from the diversity receiver to a location processing unit.
Abstract:
A high pass filter adapted for use in a signal processing device comprising a sampler adapted to sample a signal and transmit the samples to the high pass filter, the high pass filter comprising a differentiator and an integrator; a counter which, in use, counts the number of samples received by the high pass filter from the sampler; and a control device which receives a first signal from the counter when the high pass filter has received a first sample from the sampler and receives a second signal from the counter when the high pass filter has received a second or subsequent sample from the sampler; whereupon receipt of the first signal, the control device causes the integrator output signal to substantially equal zero and whereupon receipt of the second signal, the control device causes the integrator output to be a function of an input signal from the differentiator.
Abstract:
A method for calibrating an optical transceiver. The method can include configuring optical switches to enable routing at least one output signal of modulator circuitry operably coupled to a first receive path of a coherent optical transceiver. The method can include configuring the input to at least one modulator to generate at least one first stimulus signal. The method can include configuring a path from the first receiver analog-to-digital converter to an adaptive algorithm circuitry. The method can include adapting at least one bias setting of a photodiode associated with the first receiver in response to at least one first stimulus detected at the first receiver analog-to-digital converter to an adaptive algorithm circuitry. The method can include determining an optimum value of a photodiode associated with the first receiver.
Abstract:
A semiconductor device comprises sampling logic, comprising: input sample path selection logic arranged to enable at least one input sample path; sampler logic arranged to receive and sample an input data signal in a serial data stream in accordance with a phase of the at least one enabled input sample path; and transition detection logic arranged to detect transitions within the received input data signal. The input sample path selection logic is further arranged, upon detection of a transition within the received input data signal, to determine if the phase of the at least one input sample path is a phase having a largest window between logic values; and if it is determined that the phase of the at least one input sample path is not the phase having a largest window between logic values, to enable at least one input sample path comprising a more appropriate phase.
Abstract:
A method of processing location information on a mobile device which includes a primary receiver for receiving a primary signal; a diversity receiver for receiving a diversity signal or location information; a diversity combiner which can combine primary and diversity signals to form a combined signal; and a first processing unit for processing the combined signal; the method comprising the steps of: identifying whether the device is in a location mode or a diversity mode; if the device is in location mode, disabling the diversity combiner; passing the output from the primary receiver directly to the first processing unit; and passing location information from the diversity receiver to a location processing unit.