Low-complexity full-duplex radio system with enhanced digital self-interference cancellation
AssigneeSabanci Universitesi
InventorsOzgur Gurbuz, Ibrahim Tekin, Mikail Yilan, Hayrettin Ayar
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Abstract
A full-duplex radio system includes a monostatic antenna, digital self-interference cancellation (DSIC) and cyclic prefix noise reduction (CPNR) method and circuitry applying said method suitable for orthogonal frequency division multiplexing (OFDM) based full-duplex wireless communications. Said system, method and circuitry applying said method are implementable within the paradigm of in-band full-duplex (IBFD) monostatic antenna architecture, an embodiment of which comprises a dual-polarized, slot-coupled antenna.
Claims8
A full-duplex radio system comprising:
- a single antenna and digital self-interference cancellation circuitry for in-band full-duplex wireless communication,
- wherein said single antenna is a monostatic antenna, wherein said monostatic antenna comprises a dual port, dual polarized microstrip patch antenna with hybrid feeding;
- and,
- wherein said digital self-interference cancellation circuitry comprises a processor configured to execute a least-square based digital self-interference cancellation method of orthogonal frequency division multiplexing that attenuates cyclic prefix noise.
A full-duplex radio system comprising:
- a single antenna and digital self-interference cancellation circuitry for in-band full-duplex wireless communication,
- wherein said single antenna is a monostatic antenna, said monostatic antenna is a dual port, dual polarized patch antenna with differential feeding;
- and
- wherein said digital self-interference cancellation circuitry comprises a processor configured to execute a least-square based digital self-interference cancellation method of orthogonal frequency division multiplexing that attenuates cyclic prefix noise.
A full-duplex radio system comprising:
- a single antenna and digital self-interference cancellation circuitry for in-band full-duplex wireless communication,
- wherein said single antenna is a monostatic antenna, wherein said monostatic antenna is a dual polarized, double differential fed patch antenna;
- and
- wherein said digital self-interference cancellation circuitry comprises a processor configured to execute a least-square based digital self-interference cancellation method of orthogonal frequency division multiplexing that attenuates cyclic prefix noise.
A full-duplex radio system comprising:
- a single antenna and digital self-interference cancellation circuitry for in-band full-duplex wireless communication,
- wherein said single antenna is a monostatic antenna;
- wherein said digital self-interference cancellation circuitry comprises a processor configured to execute a least-square based digital self-interference cancellation method of orthogonal frequency division multiplexing that attenuates cyclic prefix noise;
- and
- wherein said processor of said digital self-interference cancellation circuitry is further configured to implement a least-squares algorithm with time or frequency domain estimation;
- and time or frequency domain reconstruction.
A digital self-interference cancellation method for in-band full-duplex wireless communication, comprising the steps of:
- signal decimation;
- where a signal received at a full-duplex antenna is collected through a software defined radio and downsampled to create a decimated signal,
- applying long training sequence (LTS) correlation and packet start detection to the decimated signal;
- where LTS symbols are tracked and packet starts are detected,
- carrier frequency offset (CFO) correction;
- wherein a carrier frequency of the decimated signal is offset corrected for the software defined radio,
- fast Fourier transformation (FFT);
- wherein fast Fourier transform is applied to the offset decimated signal,
- enhanced self-interference (SI) channel estimation;
- where a self-interference channel is estimated according to orthogonal frequency division multiplexing (OFDM) symbols and a sharp interpolation filter is applied, and
- enhanced frequency domain reconstruction;
- where cyclic prefix noise is eliminated from a residual signal, wherein the cyclic prefix noise is reconstructed with the OFDM symbols.
Dependencies are inferred from the claim text.