Wireless communication apparatus with relative distance estimation means
First Claim
1. A wireless communications system comprising:
- (a) at least one mobile terminal; and
(b) a receiver that is mobile and includes;
(i) reception level acquisition means for acquiring respective reception levels of wireless signals transmitted from the at least one mobile terminal, wherein the reception level acquisition means measures the respective reception levels of the wireless signals;
(ii) transmission level acquisition means for acquiring respective transmission levels of the at least one mobile terminal, wherein the transmission level acquisition means retrieves respective transmission levels of the at least one mobile terminal contained in the wireless signals;
(iii) difference value calculation means for calculating respective difference values between the transmission levels and the reception levels; and
(iv) relative distance estimation means for estimating a relative distance to the mobile terminal in accordance with the respective difference valueswherein;
the reception level acquisition means retrieve respective reception levels of wireless signals sent from the wireless communications apparatus to the at least one mobile terminals contained in the wireless signals of the at least one mobile terminals; and
the transmission level acquisition means measures a transmission level of the wireless communications apparatus to the at least one mobile terminals.
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Accused Products
Abstract
A wireless communications system including a mobile terminal and a mobile receiver. The receiver includes: a reception level acquisition section for acquiring reception levels of wireless signals, wherein the reception level acquisition section measures the reception levels of signals; a transmission level acquisition section for acquiring transmission levels of the terminal, wherein the transmission level acquisition section retrieves transmission levels of the terminal contained in signals; a difference value calculation section for calculating respective difference values between the transmission levels and the reception levels; and relative distance estimation section for estimating a relative distance to the terminal in accordance with the respective difference values. The reception level acquisition section retrieves reception levels of signals sent from the wireless communications apparatus to the terminal contained in signals of the terminal; and the transmission level acquisition section measures a transmission level of the wireless communications apparatus to the terminal.
13 Citations
19 Claims
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1. A wireless communications system comprising:
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(a) at least one mobile terminal; and (b) a receiver that is mobile and includes; (i) reception level acquisition means for acquiring respective reception levels of wireless signals transmitted from the at least one mobile terminal, wherein the reception level acquisition means measures the respective reception levels of the wireless signals; (ii) transmission level acquisition means for acquiring respective transmission levels of the at least one mobile terminal, wherein the transmission level acquisition means retrieves respective transmission levels of the at least one mobile terminal contained in the wireless signals; (iii) difference value calculation means for calculating respective difference values between the transmission levels and the reception levels; and (iv) relative distance estimation means for estimating a relative distance to the mobile terminal in accordance with the respective difference values wherein; the reception level acquisition means retrieve respective reception levels of wireless signals sent from the wireless communications apparatus to the at least one mobile terminals contained in the wireless signals of the at least one mobile terminals; and the transmission level acquisition means measures a transmission level of the wireless communications apparatus to the at least one mobile terminals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A wireless communications apparatus comprising:
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reception level acquisition means for acquiring respective reception levels of wireless signals transmitted from at least one mobile terminals, wherein the reception level acquisition means measures the respective reception levels of the wireless signals; transmission level acquisition means for acquiring respective transmission levels of the mobile terminal, wherein the transmission level acquisition means retrieves respective transmission levels of the mobile terminals contained in the wireless signals; difference value calculation means for calculating respective difference values between the transmission levels and the reception levels; and relative distance estimation means for estimating a relative distance to the mobile terminal in accordance with the respective difference values; wherein the reception level acquisition means retrieve respective reception levels of wireless signals sent from the wireless communications apparatus to the at least one mobile terminal contained in the wireless signals of the at least one mobile terminals; and the transmission level acquisition means measures a transmission level of the wireless communications apparatus to the at least one mobile terminals.
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Specification