Qualcomm Incorporated

Hassan Rafique

Divaydeep Sikri

Zhi-Zhong Yu

Nico De Laurentiis

Cetin Altan

Mukund Agarwal

Mungal Singh Dhanda

Philip J Children

Syed Hamza Rafique

Nita E Joseph

Cetin Atlan

Lukasz Bednarz

Antonio De Angelis

Aspects of the present disclosure provides a wireless communication apparatus configured to handle adjacent-channel interference (ACI) and spur. The apparatus receives a signal utilizing a communication interface. The apparatus is configured to perform a single discrete Fourier transform (DFT) on the signal to generate frequency domain data. The apparatus is further configured to determine respective energy of a plurality of adjacent channels of the signal utilizing the frequency domain data. The apparatus is further configured to determine one or more potential interfering channels among the adjacent channels, wherein each of the potential interfering channels has an energy greater than a qualifying threshold. The apparatus is further configured to identify one or more dominant interfering channels from among the potential interfering channels. The apparatus is further configured to detect ACI based on the one or more dominant interfering channels.

Adjacent-channel interference and spur handling in wireless communications

Embodiments of the present invention include devices, systems and methods for optimized camping on a cell. One method can include beginning a power scan of a range of radio-frequency channel numbers as part of an acquisition. Power can be measured for a first set of radio-frequency channel numbers at a time using adjacent channel interference detection. An average power can be computed for each radio-frequency channel number once the range has been scanned a predetermined number of times. Other aspects, embodiments and features are also claimed and described.

Power scan optimization

A method for wireless communication is described. A slow associated control channel block is received. It is determined that the slow associated control channel block fails an integrity check. A correlation level between the slow associated control channel block and one or more stored slow associated control channel blocks is determined. The stored slow associated control channel blocks are set based on a maximum correlation level. Other aspects, embodiments, and features are also claimed and described.

Enhanced slow associated control channel (ESACCH)

Systems and methods for decoding bitstreams are described. The bitstreams may be encoded using a punctured convolution code and received from a wireless network. A puncture pattern associated with a modulation and coding scheme used to encode the bitstream is determined, and punctured log-likelihood ratios (LLRs) generated from the bitstream are ignored while decoding the bitstream. The puncture pattern may be characterized by one or more algorithms that identify punctured LLRs in a repetitive sequence of LLRs. A decoder may exclude punctured LLRs from calculations related to bitstream decoding. The decoder may comprise a Viterbi decoder or an algebraic decoder. Other aspects, embodiments, and features are also claimed and described.

Puncturing scheme based decoder optimizations

A method for wireless communications is described. The method includes beginning a voice call using a voice services over adaptive multi-user channels on one slot receiver. Pilot signal knowledge is obtained. Interferers knowledge is also obtained. Error metrics are computed using the pilot signal knowledge and the interferers knowledge. The method further includes selecting between the voice services over adaptive multi-user channels on one slot receiver and a legacy receiver for the voice call based on the error metrics. Other aspects, embodiments and features are also claimed and described.

Quantitative interference detection

Communications devices are adapted to receive a plurality of RF bursts of a radio block, where the plurality of RF bursts includes a number of RF bursts less than a total number of RF bursts for the radio block. A header can be decoded from the received plurality of RF burst. From the decoded header, a determination may be made whether the radio block is intended for the communications device or for another device. According to at least some examples, if the radio block is determined to be intended for another device, at least a portion of a receiver circuit of the communications device can be powered down. Also, according to at least some examples, if the radio block is determined to be intended for the receiving communications device, a data payload of the radio block may be decoded. Other aspects, embodiments, and features are also claimed and described.

Methods and devices for facilitating early header decoding in communications devices

An apparatus is provided for demodulating a block, the block including a plurality of bursts. The apparatus comprises a demodulator configured to demodulate the plurality of bursts and a modulation detector configured to detect a modulation scheme for a current burst in the plurality of bursts and to determine whether there is a high probability that the detected modulation scheme is correct. The modulation detector instructs the demodulator to demodulate each burst subsequent to the current burst in the plurality of bursts based on the detected modulation scheme when the modulation detector determines a high probability that the modulation scheme is correct.

Enhanced modulation detection

The present patent application improves DARP by allowing multiple users on one time slot (MUROS). It comprises means, instructions and steps for combining two signals. In one example, it comprises at least one baseband modulator, a plurality of amplifiers where the signals are multiplied by a gain; at least one combiner operably connected to the amplifiers where the signals are combined; and a phase shifter where one of the signals is phase shifted with respect to the other signal. In another example; the apparatus further comprises a phase shifter operably connected to the at least one baseband modulator to provide a &#x3c0;/2 phase shift between the two signals. In another example, the at least one baseband modulator comprises a BPSK baseband modulator on an I axis and a BPSK baseband modulator on a Q axis.

MUROS modulation using linear baseband combinations with linear gaussian pulse shaping for two users on one timeslot used by non-DARP and DARP remote stations

Co-channel communications methods, systems, and devices are provided. Embodiments can be utilized to allow multiple users on one time slot (MUROS). For example, a method for wireless communication by a first remote station can comprise receiving a first co-channel signal that has a first amplitude and a second co-channel signal that has a second amplitude, wherein a difference between the first amplitude and the second amplitude is less than a threshold; selecting one of the first co-channel signal and the second co-channel signal; and demodulating the selected co-channel signal. Other aspects, embodiments, and features are also claimed and described.

Co-channel communication methods, systems, and devices

Estimating an unknown frequency error of a tone signal may comprise sampling, within an error bandwidth, wireless signals including the tone signal that occupy the error bandwidth to generate signal samples, and repeatedly, for different frequency offsets: applying a frequency offset to the signal samples to produce offset values that represent the signals occupying an offset bandwidth equal to the error bandwidth offset by an offset frequency; estimating, within a frequency estimation range less than the error bandwidth, a tone frequency error using the offset values; and measuring a signal-to-noise ratio of the tone signal using the signal samples and the estimated tone frequency error. Other aspects, embodiments, and features are also claimed and discussed.

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Farnborough, United Kingdom

Hassan Rafique