Position acquisition
AssigneeNokia Corporation
InventorsMichael Overy, Natividade Lobo
Life of this patent
Estimating the term…
Abstract
A first transceiver (4, 30) can position itself by forming an ad hoc network (20) of transceivers which assist the first transceiver in acquiring its position. A dedicated infrastructure such as GPS satellites is not required. The first transceiver (4, 30), once it has acquired its position, can be involved in a network (20) by another transceiver (32, 34, 36, 38, 40) to assist in the positioning of that transceiver. The acquisition of the position may involve factors such as the trustworthiness of the transceivers in the network and/or the positions of transceivers with which the first transceiver cannot directly communicate.
Claims21
A receiver for calculating a position of the receiver according to a plurality of transmitters, including a processor being
- arranged to calculate a probability density function for each of said plurality of transmitters by the convolution of
- (i). the probability density function representing a position of one of the plurality of said transmitters, sent by said one transmitter to the receiver;
- with
- (ii). the probability density function representing a likelihood that a transmission from said one transmitter will be successfully received at the receiver;
- and
- arranged to combine the resultant plurality of probability density functions.
A receiver as claimed in any preceding claim wherein the transmitters are not permanent infrastructure.
A receiver as claimed in 1, wherein the transmitters are not permanent infrastructure.
A receiver for calculating a position of the receiver according to a first transmitter, including a processor arranged to convolve:
- (i). a probability density function representing a position of the first transmitter, sent by the first transmitter to the receiver;
- with
- (ii). the probability density function representing a likelihood that a transmission from the first transmitter will be successfully received at the receiver.
A method of calculating a position of a receiver by communication with a plurality of transceivers comprising the steps of:
- for each of said plurality of transmitters, convolving:
- (i). a probability density function representing a position of a transmitter, sent by the transmitter to the receiver, with
- (ii). a probability density function representing a likelihood that a transmission from the transmitter will be successfully received at the receiver;
- and
- combining the plurality of convolution products.
Dependencies are inferred from the claim text.