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US 10,594,521 B2Granted
Asynchronous multicarrier communications
AssigneeQUALCOMM Incorporated
InventorsJoseph Binamira Soriaga, Tingfang Ji, John Edward Smee, Naga Bhushan, Peter Gaal, Krishna Kiran Mukkavilli, Alexei Yurievitch Gorokhov
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Abstract
Apparatuses and methods for performing asynchronous multicarrier communications are provided. One such method involves generating, at a first wireless device, a waveform including one or more carriers, shaping the waveform to reduce interference between the waveform and adjacent waveforms, and transmitting, on a spectrum, the shaped waveform asynchronously.
Claims24
A method of wireless communication, comprising:
- receiving, at a first wireless device, a signal via asynchronous communications from a second wireless device in an orthogonal frequency division multiple access (OFDMA) communication system, wherein the signal comprises an orthogonal waveform comprising one or more carriers;
- filtering the received signal to reduce interference from other asynchronous communications in the OFDMA communication system;
- and
- recovering user data from the filtered signal, wherein the recovering comprises:
- applying an OFDMA demodulation to the received signal to generate a plurality of frequency domain outputs, and
- applying frequency domain equalization to the frequency domain outputs to recover a plurality of user tones from the second wireless device.
3 more elements
A method of wireless communication, comprising:
- receiving, at a first wireless device, a signal via asynchronous communications on a spectrum, wherein the signal comprises an orthogonal waveform comprising one or more carriers, and wherein the receiving comprises:
- receiving the signal from a second wireless device communicating asynchronously on the spectrum;
- filtering the received signal to reduce interference from other asynchronous communications on the spectrum, wherein the filtering comprises:
- demodulating and filtering the received signal to obtain a user signal at a preselected subcarrier, thereby reducing interference from other wireless devices communicating asynchronously on the spectrum;
- and
- recovering user data from the filtered signal, wherein the recovering comprises:
- applying frequency domain equalization to a processed signal derived from the user signal, thereby generating a plurality of equalized symbols, and
- recovering the user data from the equalized symbols.
5 more elements
A wireless communication device, comprising:
- means for receiving, at a first wireless device, a signal via asynchronous communications from a second wireless device in an orthogonal frequency division multiple access (OFDMA) communication system, wherein the signal comprises an orthogonal waveform comprising one or more carriers;
- means for filtering the received signal to reduce interference from other asynchronous communications in the OFDMA communication system;
- and
- means for recovering user data from the filtered signal, wherein the means for recovering comprises:
- means for applying an OFDMA demodulation to the received signal to generate a plurality of frequency domain outputs, and
- means for applying frequency domain equalization to the frequency domain outputs to recover a plurality of user tones from the second wireless device.
3 more elements
A wireless communication device, comprising:
- means for receiving, at a first wireless device, a signal via asynchronous communications on a spectrum, wherein the signal comprises an orthogonal waveform comprising one or more carriers, and wherein the means for receiving comprises:
- means for receiving the signal from a second wireless device communicating asynchronously on the spectrum;
- means for filtering the received signal to reduce interference from other asynchronous communications on the spectrum, wherein the means for filtering comprises:
- means for demodulating and filtering the received signal to obtain a user signal at a preselected subcarrier, thereby reducing interference from other wireless devices communicating asynchronously on the spectrum;
- and
- means for recovering user data from the filtered signal, wherein the means for recovering comprises:
- means for applying frequency domain equalization to a processed signal derived from the user signal, thereby generating a plurality of equalized symbols, and
- means for recovering the user data from the equalized symbols.
5 more elements
A wireless communication device, comprising:
- at least one processor;
- a memory communicatively coupled to the at least one processor;
- and
- a communication interface communicatively coupled to the at least one processor, wherein the at least one processor is configured to:
- receive, at a first wireless device, a signal via asynchronous communications from a second wireless device in an orthogonal frequency division multiple access (OFDMA) communication system, wherein the signal comprises an orthogonal waveform comprising one or more carriers;
- filter the received signal to reduce interference from other asynchronous communications in the OFDMA communication system;
- and
- recover user data from the filtered signal, wherein the at least one processor is further configured to:
- apply an OFDMA demodulation to the received signal to generate a plurality of frequency domain outputs, and
- apply frequency domain equalization to the frequency domain outputs to recover a plurality of user tones from the second wireless device.
7 more elements
A wireless communication device, comprising:
- at least one processor;
- a memory communicatively coupled to the at least one processor;
- and
- a communication interface communicatively coupled to the at least one processor, wherein the at least one processor is configured to:
- receive, at a first wireless device, a signal via asynchronous communications on a spectrum, wherein the signal comprises an orthogonal waveform comprising one or more carriers, wherein the at least one processor is further configured to receive the signal from a second wireless device communicating asynchronously on the spectrum,
- filter the received signal to reduce interference from other asynchronous communications on the spectrum, wherein the at least one processor is further configured to demodulate and filter the received signal to obtain a user signal at a preselected subcarrier, thereby reducing interference from other wireless devices communicating asynchronously on the spectrum, and
- recover user data from the filtered signal, wherein the at least one processor is further configured to:
- apply frequency domain equalization to a processed signal derived from the user signal, thereby generating a plurality of equalized symbols, and
- recover the user data from the equalized symbols.
6 more elements
A non-transitory computer readable medium storing computer executable code, comprising code for:
- receiving, at a first wireless device, a signal via asynchronous communications from a second wireless device in an orthogonal frequency division multiple access (OFDMA) communication system, wherein the signal comprises an orthogonal waveform comprising one or more carriers;
- filtering the received signal to reduce interference from other asynchronous communications in the OFDMA communication system;
- and
- recovering user data from the filtered signal, wherein the recovering the user data comprises:
- applying an OFDMA demodulation to the received signal to generate a plurality of frequency domain outputs, and
- applying frequency domain equalization to the frequency domain outputs to recover a plurality of user tones from the second wireless device.
3 more elements
A non-transitory computer readable medium storing computer executable code, comprising code for:
- receiving, at a first wireless device, a signal via asynchronous communications on a spectrum, wherein the signal comprises an orthogonal waveform comprising one or more carriers, the non-transitory computer readable medium comprising further code for receiving the signal from a second wireless device communicating asynchronously on the spectrum;
- filtering the received signal to reduce interference from other asynchronous communications on the spectrum, the non-transitory computer readable medium comprising further code for demodulating and filtering the received signal to obtain a user signal at a preselected subcarrier, thereby reducing interference from other wireless devices communicating asynchronously on the spectrum;
- and
- recovering user data from the filtered signal, the non-transitory computer readable medium comprising further code for:
- applying frequency domain equalization to a processed signal derived from the user signal, thereby generating a plurality of equalized symbols, and
- recovering the user data from the equalized symbols.
3 more elements
Dependencies are inferred from the claim text.