32results about "Service/auxillary channels monitoring" patented technology

Methods and systems are provided for coarse phase estimation for highly-spectrally efficient communications. An example method may include, equalizing, in a receiver, a received inter-symbol correlated (ISC) signal to generate an equalized ISC signal. A phase adjustment signal may be generated based on an ISC feedback signal. The ISC feedback signal may be generated using a sequence estimation process and a non-linearity function. A phase of the equalized ISC signal may be adjusted using the generated phase adjustment signal, to generate a phase adjusted partial response signal. The phase adjustment signal may be generated based on a phase difference between the equalized ISC signal and the partial response feedback signal. At least one ISC vector may be generated by buffering samples of the phase adjusted ISC signal.

A method and system for over the air performance testing based on a multi-antenna system are disclosed. The method comprises: a branch device mapping path signals from a channel emulator to test antennas according to the set number of the combined sub-paths and sub-path mapping rule; the test antennas transmitting spatial signals according to the path signals from the branch device; and a device under test receiving the spatial signals; and an over the air performance analysis and display module analyzing and displaying the over the air performance of the device under test based on the spatial signals received by the device under test. The present invention implements the test of the over the air performance of a multi-antenna terminal.

A method and system for testing a wireless data packet transceiver as a device under test (DUT) adapted to operate in conformance with a wireless signal standard such that a transmitted signal, when received by an intended receiver, is to result in a responsive signal transmission acknowledging such signal reception. During testing, responsive signal transmissions, e.g., acknowledgement signals, are withheld by the test system until after a predetermined number of data packets have been captured from the DUT, until a predetermined time interval has passed, or until data packets at a predetermined number of data rates have been captured from the DUT.

When a voice over Internet protocol (VOIP) telephone call is being conducted by a mobile telephony device, measurements of at least one condition that exists for the mobile telephone device during the VOIP telephone call are taken during the duration of the telephone call. The measurements could be taken periodically as the VOIP telephone call progresses. The measured condition is one that could affect the perceived quality of the VOIP telephone call. The measurements of the at least one condition are recorded against the telephone call for later use and analysis. The recorded information may be analyzed to determine how to modify a setting of the mobile telephony device to improve the quality of VOIP telephone calls conducted with the mobile telephony device.

Disclosed are wireless communication systems and methods for calibrating same. The communication systems may include first wireless transceivers having: (a) a modem, and (b) one or more Radio Frequency (RF) chain pairs. There may also be included a sounding circuit block. A calibrated switchable bridging block (CSBB) may switchably couple signals between the first transceivers and the sounding circuit block. Calibration control logic may regulate signal flow through said CSBB during a sounding sequence of said first wireless transceiver and may apply compensation coefficients to RF compensation circuits functionally associated with said the wireless transceiver RF chain pairs.

A clock margin test system, method and corresponding device are disclosed in the present invention. The system includes that a clock margin adjustment device, a product system under test and a product performance parameter monitoring device are connected successively. The clock margin adjustment device is set as receiving a clock signal output by a driving clock source of the product system under test, adjusting the reference level and / or amplitude of the clock signal, performing a butt matching processing on the adjusted clock signal, so as to generate the clock signal for butt-matching with the product system under test, and then output the clock signal; the product system under test is set as inputting the clock signal output by the driving clock source of the product system under test into the clock margin adjustment device, receiving the clock signal output by the clock margin adjustment device and providing it as a driving clock to the part, which requires the driving clock, of the product system under test; the product performance parameter monitoring device is set as monitoring the performance parameter of the product under test when the part, which requires the driving clock, of the product system under test works under driving of the driving clock.

A receiver architecture optimizes receiver performance in the presence of interference. In various embodiments, power estimation circuits are used with variable selectivity to determine the exact nature of the interference and to optimize the performance correspondingly. The variable selectivity is achieved using stages of filtering with progressively narrower bandwidths. Also, the actual method of optimizing the receiver performance is an improvement compared to the traditional techniques in that the gain settings and the baseband filter order (stages to be used) will be optimized based on the nature of the interference as determined by the power detector measurements. For a device such as a cellular phone that operates in a dynamic and changing environment where interference is variable, embodiments advantageously provide the capability to modify the receiver's operational state depending on the interference.

A method and system of total radiated sensitivity(TRS) testing for multi-antenna system are provided, wherein the method includes the following steps: configuring the number of data streams sent by the base station as "1" and the number of the receiving antennas in the device under test (DUT) as "n=2"; the DUT turning on "n" antennas and receiving the data stream sent by the base station at the predetermined position; at each testing spot, the base station measuring the effective isotropic sensitivity EIS? and EISF when the data stream meets the testing condition, after that, calculating the TRS of the data stream according to the EIS? and EISF of each testing spot. The present invention provides the technical solution of testing the TRS of one data stream or two data streams in the multi-antenna system.

A method for testing total isotropic sensitivity (TIS) of a mobile terminal is provided in the present invention, which includes: acquiring a function relation curve of input power PInAnt of antenna port and bit error rate (BER) for a channel to be tested: BER = f(PInAnt ), or PInAnt = f -1(BER); according to said function relation curve of the input power of the antenna port and BER, performing f and ? polarization tests to obtain the effective isotropic sensitivity EIS ? ( ? i , f j ) and EIS f ( ? i , f j ) at a space position (? i , f j ); after testing the EIS ? ( ? i , f j ) and EIS f ( ? i , f j ) at all space positions, calculating to obtain the TIS for said channel to be tested. According to the emibodiments of the present invention, on the premise that the test precision is not lost, the TIS test speed can be effectively improved, and the fast and accurate TIS test can be realized.