Pctel, Inc.

Wei Zha

Amir Soltanian

Gang Wang

Wei Lu

Tony Kobrinetz

Yuelun Guo

Antony Thanesh Soosai Retnam

Kamran Ghavami

A system and method for 5G new radio (NR) low-density low density parity check (LDPC) decoding comprising performing a Fast Fourier Transform using a Fast Fourier Transform algorithm. The system and method determines if a reference sequence is present and performing a channel estimate and a channel interpolate for the channel estimate if the reference sequence is present. The system and method demodulates at least one orthogonal frequency division multiplexing (OFDM) symbol according to r*conj(H)/(norm(H)+Noise_Power). The system and method decodes the demodulated at least one orthogonal frequency division multiplexing symbol, and determines if the decoded at least one orthogonal frequency division multiplexing symbol is correct.

Method for 5G NR low-density parity-check decoding

Embodiments disclosed herein include systems and methods for locating all synchronization signal blocks on a 5G new radio channel. Such systems and methods can include measuring downlink signal energy over a bandwidth of the 5G new radio channel to identify a center frequency of a signal broadcast on the 5G new radio channel, processing the signal at the center frequency of the signal to identify a first of a plurality of synchronization signal blocks and global OFDM symbol boundaries for the wireless radio channel, and using the global OFDM symbol boundaries for all raster frequencies of the 5G new radio channel to identify remaining ones of the plurality of synchronization signal blocks.

Systems and methods for locating all synchronization signal blocks on a 5G NR channel

Systems and methods for measuring wireless uplink signal quality of a P25 H-CPM uplink waveform are provided. In particular, such systems and methods can include calculating an SINR measurement and/or an FBER measurement for the P25 H-CPM uplink waveform to determine whether P25 user equipment has been successfully deployed.

Systems and methods for measuring wireless uplink signal quality

Systems and methods for classifying a P25 Phase 1 downlink transmission as using either C4FM modulation or CQPSK modulation are provided. Some methods can include calculating a first signal-to-noise ratio (SNR) at or near a middle of a first symbol of a received wireless signal, calculating a second SNR at or near an edge of the first symbol, calculating a difference between the second SNR and the first SNR, determining whether the difference is greater than a threshold, and classifying a modulation technique of the received wireless signal as either C4FM modulation or CQPSK modulation based on whether the difference is greater than the threshold.

Systems and methods for wireless signal classification

Systems and methods are provided for calculating a SINR measurement for an oversampled P25 C4FM wireless signal received by P25 user equipment or a P25 receiver to determine whether a P25 network and the P25 user equipment or the P25 receiver have been successfully deployed. Some methods can include calculating a first order envelop mean value for the oversampled wireless signal, calculating a second order envelop mean value for the oversampled wireless signal, calculating a fourth order envelop mean value for the oversampled wireless signal, using the fourth order envelop mean value and the second order envelop mean value to estimate the SINR measurement, and using the first order envelop mean value and the second order envelop mean value to refine the SINR measurement.

Systems and methods for measuring wireless signal quality

Systems and methods for acquiring wireless network performance data comprising a user equipment accessible via a wireless network, the user equipment comprising; a receiver, a transmitter, a first processor configured with software executable instructions to cause the user equipment to perform operations comprising; receiving a data acquisition signal via the receiver, sampling a wireless network signal received at the user equipment in response to receiving the data acquisition signal, generating acquired network data, and transmitting the acquired network data via the transmitter, a server accessible via the wireless network, the server comprising, a second processor configured with software executable instructions to cause the server to perform operations comprising; transmitting the data acquisition signal, receiving the acquired network data; and generating network performance data using the acquired network data.

System and method for acquiring network data

A system and method for SSS detection under carrier frequency offset in an orthogonal frequency-division multiple access (OFDMA) downlink channel. A processor receives a signal sample that includes a transmission on a primary synchronization signal (PSS) and a transmission on a one secondary synchronization signal (SSS). The processor determines a correlation 'P' of a first symbol transmitted in the PSS of the signal sample to a first known symbol at each time 't' of time increments k of the signal sample and a correlation &#x201c;S&#x201d; of a second symbol transmitted in the a SSS to a second known symbol at each time t-.5/7 msecs. The processor receives a candidate phase rotation of &#x3b8;from a set of &#x201c;i&#x201d; candidates and determines a correlation &#x201c;Cmax&#x201d; over the time increments k representing a maximum amplitude of a combined correlation of S and P, with P rotated by &#x3b8;. The processor determines the cell identifier from the first and second known symbols that produced S and P of C max and an estimation of the frequency offset between a transmitter of the signal sample and a receiver of the signal sample.

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Boyds, MD, United States of America

Wei Zha