Slow phase-time division multiple access (sp-tdma) modulation scheme in a mimo radar
AssigneeProvizio Limited
InventorsSteven CHRISTIE, Peter LUDLOW, Predrag BRATIC
Life of this patent
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Abstract
A millimeter wave automotive radar, that includes a plurality of millimeter wave transmitters, that are configured to transmit phase coded signals simultaneously according to a phase modulation scheme, and a plurality of sub-arrays operably coupled to respective plurality of millimeter wave transmitters, wherein each sub-array includes a predefined number of transmitter elements that are configured to transmit a phase coded signal received from respective millimeter wave transmitter on separate, mutually orthogonal time slots from the other sub-arrays, using time division multiplexing.
Claims13
A millimeter wave digital automotive radar, comprising:
- a plurality of millimeter wave transmitters, that are configured to transmit phase coded signals simultaneously according to a phase modulation scheme;
- a set of antenna elements provided for each millimeter wave transmitter to form a plurality of sets of antenna elements for corresponding plurality of millimeter wave transmitters, wherein each set of antenna elements sequentially transmit a phase coded signal received from each respective transmitter on separate, mutually orthogonal time slots using time division multiplexing, such that each antenna of the set transmit similar phase coded signal at a different time slot with respect to other antennas of the set, and wherein each antenna element is assigned an index number within each corresponding set, such that the antenna elements of similar index number across the plurality of sets of antenna elements transmit simultaneously during different time slots using different slow phase codes;
- and
- a plurality of millimeter wave receivers coupled to antennas, wherein, the millimeter wave receivers receive the reflected phase coded signal from objects at a distance from the radar according to the Time division multiple access (TDMA) modulation scheme.
A method of operating a millimeter wave automotive radar, comprising:
- enabling a plurality of millimeter wave transmitters to transmit phase coded signals simultaneously according to a phase modulation scheme;
- providing a set of antenna elements for each millimeter wave transmitter to form a plurality of sets of antenna elements for corresponding plurality of millimeter wave transmitters;
- and
- enabling the antenna elements of each set to sequentially transmit a phase coded signal received from each respective transmitter on separate, mutually orthogonal time slots using time division multiplexing, such that each antenna of the set transmit similar phase coded signal at a different time slot with respect to other antennas of the set, and wherein each antenna element is assigned an index number within each corresponding set, such that the antenna elements of similar index number across the plurality of sets of antenna elements transmit simultaneously during different time slots using different slow phase codes.
Dependencies are inferred from the claim text.