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US 10,700,897 B2Granted
Transmitter, receiver and a method for digital multiple sub-band processing
AssigneeTechnion Research & Development Foundation Limited
InventorsMoshe Nazarathy, Alex Tolmachev
Life of this patent
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Abstract
Highly efficient digital domain sub-band based receivers and transmitters.
Claims32
A receiver that comprises:
- a first serial to parallel converter arranged to receive first digital signals that represent optical signals of a first polarity, and to output the first digital signals via multiple outputs;
- a first polyphase finite impulse response (FIR) filter array coupled between the first serial to parallel converter and to a first inverse fast Fourier transform (IFFT) module;
- a second serial to parallel converter arranged to receive second digital signals that represent optical signals of a second polarity, and to output the second digital signals via multiple outputs;
- a second polyphase finite impulse response (FIR) filter array coupled between the second serial to parallel converter and to a second (IFFT) module;
- multiple sub-band processor modules;
- wherein each sub-band processor module is coupled to inputs of a same order of the first and second IFFT modules;
- wherein the sub-band processor modules are Orthogonal Frequency Division Multiplex (OFDM) sub-band receiver modules;
- and
- wherein the receiver comprises a de-mapper and a data multiplexor that follows the multiple OFDM sub-band receiving modules.
6 more elements
A receiver that comprises:
- a first serial to parallel converter arranged to receive first digital signals that represent optical signals of a first polarity, and to output the first digital signals via multiple outputs;
- a first polyphase finite impulse response (FIR) filter array coupled between the first serial to parallel converter and to a first inverse fast Fourier transform (IFFT) module;
- a second serial to parallel converter arranged to receive second digital signals that represent optical signals of a second polarity, and to output the second digital signals via multiple outputs;
- a second polyphase finite impulse response (FIR) filter array coupled between the second serial to parallel converter and to a second (IFFT) module;
- multiple sub-band processor modules;
- wherein each sub-band processor module is coupled to inputs of a same order of the first and second IFFT modules;
- and
- a coherent optical front end and two pairs of analog to digital converters (ADCs);
- wherein the coherent optical front end is arranged to:
- receive the optical signals of the first and second polarity;
- provide analog signals representative of the optical signals of the first polarization to a first pair of ADCs, and
- provide analog signals representative of the optical signals of the second polarization to a second pair of ADCs;
- wherein the first pair of ADCs is coupled to the first serial to parallel converter;
- and
- wherein the second pair of ADCs is coupled to the second serial to parallel converter.
12 more elements
A receiver that comprises:
- a first serial to parallel converter arranged to receive first digital signals that represent optical signals of a first polarity, and to output the first digital signals via multiple outputs;
- a first polyphase finite impulse response (FIR) filter array coupled between the first serial to parallel converter and to a first inverse fast Fourier transform (IFFT) module;
- a second serial to parallel converter arranged to receive second digital signals that represent optical signals of a second polarity, and to output the second digital signals via multiple outputs;
- a second polyphase finite impulse response (FIR) filter array coupled between the second serial to parallel converter and to a second (IFFT) module;
- multiple sub-band processor modules;
- wherein each sub-band processor module is coupled to inputs of a same order of the first and second IFFT modules;
- and
- a pair of IFFT modules, a pair of parallel to parallel converters and a pair of block-parallelized carrier recovery (CR) and decision modules.
5 more elements
Dependencies are inferred from the claim text.