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US 8,947,993 B2Granted
Methods of transmitting using filtering in the time domain and related devices
AssigneeTelefonaktiebolaget L M Ericsson (publ)
InventorsChester Park, Dennis Hui
Life of this patent
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Abstract
Methods may be provided to transmit data from a wireless terminal operating in a radio access network. For example, sampling rate conversion may be performed on a serial stream of modulation symbols to generate sampling rate converted symbols, and the sampling rate converted symbols may be transmitted over a wireless channel to a node of the radio access network. Related terminals are also discussed.
Claims26
A method of transmitting data from a wireless terminal operating in a radio access network, the method comprising:
- performing sampling rate conversion on a serial stream of modulation symbols to generate sampling rate converted symbols;
- and
- transmitting the sampling rate converted symbols over a wireless channel to a node of the radio access network,
- wherein performing sampling rate conversion comprises,
- generating samples of transmission symbols from a serial stream of modulation symbols,
- filtering the samples of the transmission symbols using convolution in a time domain to generate filtered samples of the transmission symbols, and
- down sampling the filtered samples of the transmission symbols to generate the sampling rate converted symbols.
4 more elements
A method of transmitting data from a wireless terminal operating in a radio access network, the method comprising:
- performing sampling rate conversion on a serial stream of modulation symbols to generate sampling rate converted symbols;
- and
- transmitting the sampling rate converted symbols over a wireless channel to a node of the radio access network,
- wherein performing sampling rate conversion comprises,
- generating samples of transmission symbols from a serial stream of modulation symbols,
- generating multiple blocks of coefficients using pre-calculated information;
- multiplying each block of coefficients by a respective one of the samples of transmission symbols to provide respective coefficient block products, and
- summing the coefficient block products to generate the sampling rate converted symbols, and
- wherein generating multiple blocks of coefficients using pre-calculated information comprises,
- retrieving a block of coefficients from memory,
- cyclically shifting at least portions of the block of coefficients to generate a plurality of cyclically shifted versions of the block of coefficients, and
- down sampling each of the cyclically shifted versions of the block of coefficients to provide multiple blocks of down sampled cyclically shifted versions of the block of coefficients.
9 more elements
A wireless terminal for communication in a radio access network, the wireless terminal comprising:
- a processor configured to perform sampling rate conversion on a serial stream of modulation symbols to generate sampling rate converted symbols;
- and
- a transmitter configured to transmit the sampling rate converted symbols over a wireless channel to a node of the radio access network,
- wherein the processor is configured to perform sampling rate conversion on the serial stream of modulation symbols by,
- generating samples of transmission symbols from a serial stream of modulation symbols,
- filtering the samples of the transmission symbols using convolution in a time domain to generate filtered samples of the transmission symbols, and
- down sampling the filtered samples of the transmission symbols to generate the sampling rate converted symbols.
4 more elements
A method of transmitting data from a wireless terminal operating in a radio access network, the method comprising:
- performing sampling rate conversion on a serial stream of modulation symbols to generate sampling rate converted symbols, wherein performing sampling rate conversion comprises,
- generating samples of transmission symbols from a serial stream of modulation symbols,
- generating multiple blocks of coefficients using pre-calculated information;
- multiplying each block of coefficients by a respective one of the samples of transmission symbols to provide respective coefficient block products, and
- summing the coefficient block products to generate the sampling rate converted symbols;
- after summing the coefficient block products, digitally mixing the sampling rate converted symbols with a mixing sequence;
- and
- after digitally mixing the sampling rate converted symbols, transmitting the sampling rate converted symbols over a wireless channel to a node of the radio access network.
5 more elements
A wireless terminal for communication in a radio access network, the wireless terminal comprising:
- a processor configured to:
- generate samples of transmission symbols from a serial stream of modulation symbols;
- generate multiple blocks of coefficients using pre-calculated information;
- multiply each block of coefficients by a respective one of the samples of transmission symbols to provide respective coefficient block products;
- and
- sum the coefficient block products;
- and
- a transmitter configured to transmit the summed coefficient block products over a wireless channel to a node of the radio access network,
- wherein the processor is configured to generate multiple blocks of coefficients using pre-calculated information by,
- retrieving a block of coefficients from memory,
- cyclically shifting at least portions of the block of coefficients to generate a plurality of cyclically shifted versions of the block of coefficients, and
- down sampling each of the cyclically shifted versions of the block of coefficients to provide multiple blocks of down sampled cyclically shifted versions of the block of coefficients.
9 more elements
Dependencies are inferred from the claim text.