Fixed wireless access using orthogonal time frequency space modulation
A fixed wireless access system is implemented using orthogonal time frequency space multiplexing (OTFS). Data transmissions to/from different devices share transmission resources using—delay Doppler multiplexing, time-frequency multiplexing, multiplexing at stream and/or layer level, and angular multiplexing. Time-frequency multiplexing is achieved by dividing the time-frequency plan into subgrids, with the subsampled time frequency grid being used to carry the OTFS data. Antenna implementations include a hemispherical antenna with multiple antenna elements arranged in an array to achieve multiplexing.
1. An antenna system, comprising:
a substantially planar portion comprising a heat sink;
a hemispherical dome attached to the substantially planar portion at a base of the hemispherical dome, wherein the hemispherical dome includes a hemispherical layered Luneburg lens comprising a plurality of dielectric layers of varying dielectric constants; and
one or more antenna elements positioned within the hemispherical dome, each antenna element communicatively coupled to a data feed and being able to transmit and/or receive data bursts according to a transmission scheme comprising an orthogonal time frequency space (OTFS) transform that converts a signal between a time-frequency domain and a delay-Doppler domain and corresponds to an application of a symplectic Fourier transform.
2. The antenna system of claim 1 , wherein the antenna system is operable to achieve at least one of time-frequency multiplexing, delay-Doppler domain multiplexing, a spatial multiplexing and a stream/layer multiplexing.
3. The antenna system of claim 1 , wherein the substantially planar portion comprises a ground plane.
4. The antenna system of claim 1 , wherein the one or more antenna elements are arranged as a planar ultrawideband phased array (PUMA) antenna configuration.
5. The antenna system of claim 1 , wherein the one or more antenna elements comprise a dipole antenna.
6. The antenna system of claim 1 , wherein the data feed is positioned conformal to the hemispherical dome.
7. A fixed wireless access (FWA) point apparatus comprising an antenna system, wherein the antenna system comprises:
a substantially planar portion comprising a heat sink;
a hemispherical dome attached to the substantially planar portion at a base of the hemispherical dome, wherein the hemispherical dome includes a hemispherical layered Luneburg lens comprising a plurality of dielectric layers of varying dielectric constants; and
one or more antenna elements positioned within the hemispherical dome, each antenna element communicatively coupled to a data feed and being able to transmit and/or receive data bursts according to a transmission scheme comprising an orthogonal time frequency space (OTFS) modulation that converts a signal between a time-frequency domain and a delay-Doppler domain and corresponds to an application of a symplectic Fourier transform.
8. The apparatus of claim 7 , further including a controller processor, the controller processor controlling the antenna system to transmit data bursts to a plurality of receivers.
9. The apparatus of claim 7 , wherein the FWA point apparatus is configured to support a backhaul link.
10. A method of wireless communication, comprising:
transmitting, using an antenna system, a plurality of data bursts according to a transmission scheme comprising an orthogonal time frequency space (OTFS) modulation that converts a signal between a time-frequency domain and a delay-Doppler domain and corresponds to an application of a symplectic Fourier transform,
wherein the antenna system comprises:
a substantially planar portion comprising a heat sink,
a hemispherical dome attached to the substantially planar portion at a base of the hemispherical dome, wherein the hemispherical dome includes a hemispherical layered Luneburg lens comprising a plurality of dielectric layers of varying dielectric constants, and
one or more antenna elements positioned within the hemispherical dome, each antenna element communicatively coupled to a data feed and being configured to transmit the plurality of data bursts.
11. The method of claim 10 , wherein the antenna system is operable to achieve at least one of time-frequency multiplexing, delay-Doppler domain multiplexing, a spatial multiplexing and a stream/layer multiplexing.
12. The method of claim 10 , wherein the substantially planar portion comprises a ground plane.
13. The method of claim 10 , wherein the one or more antenna elements are arranged as a planar ultrawideband phased array (PUMA) antenna configuration.
14. The method of claim 10 , wherein the one or more antenna elements comprise a dipole antenna.
15. The method of claim 10 , wherein the data feed is positioned conformal to the hemispherical dome.
16. The method of claim 10 , wherein the antenna system is configured to support a backhaul link.