Apparatus and method for spatial filtering by estimating angle of deviation for line of sight of user
AssigneeElectronics and Telecommunications Research Institute
InventorsSeon-Ae KIM, Young-Hoon KIM, Byung-Jae KWAK, Soo Chang KIM, Seung Chan BANG, Moon-Sik LEE
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Abstract
An apparatus for spatial filtering receives a signal transmitted from a first terminal and detects a synchronization start point in time from a transmission frame included in the signal. The apparatus for spatial filtering demodulates a user-defined sequence included in the transmission frame and the at least one SRJBF sequence when the synchronization start point in time is detected, and then estimates a relative angle based on the demodulated user-defined sequence and SRJBF sequence.
Claims6
An apparatus for spatial filtering, comprising:
- a radio frequency (RF) processor receiving a signal including a transmission frame, transmitted from a first terminal, and RF-processing the received signal;
- a synchronization processor detecting a synchronization point in time for signal demodulation using a synchronization signal included in the transmission frame of the signal RF-processed by the RF processor;
- a received signal processor demodulating a user-defined sequence and spatial random jitter beamforming (SRJBF) sequences received after the user-defined sequence when the synchronization processor detects the synchronization point in time;
- a sequence storage storing the user-defined sequence demodulated by the received signal processor therein;
- and
- an angle estimator estimating an angle of deviation between the apparatus and the first terminal based on a reference direction line of the apparatus by using the user-defined sequence stored in the sequence storage and the SRJBF sequences demodulated by the received signal processor.
A method for spatial filtering performed by an apparatus for spatial filtering, comprising:
- receiving a signal transmitted from a first terminal and detecting a synchronization point in time from a transmission frame included in the signal;
- demodulating a user-defined sequence included in the transmission frame when the synchronization point in time is detected;
- demodulating at least one spatial random jitter beamforming (SRJBF) sequence transmitted after the user-defined sequence;
- and
- estimating an angle of deviation between the apparatus and the first terminal based on a reference direction line of the apparatus by using the demodulated user-defined sequence and SRJBF sequence.
Dependencies are inferred from the claim text.