Communication system, communication device, methods of operation and computer programs
In accordance with an aspect of the present disclosure, a communication system is provided, comprising: a first ultra-wideband (UWB) transmitter configured to be coupled to a first antenna; a second UWB transmitter configured to be coupled to a second antenna; a controller configured to cause the first UWB transmitter to transmit a first packet to an external communication device, wherein the first packet contains a predefined code; wherein the controller is further configured to cause the second UWB transmitter to transmit a second packet to the external communication device, wherein the second packet contains a cyclically shifted version of said predefined code. In accordance with another aspect of the present disclosure, a communication device is provided, comprising: an ultra-wideband (UWB) receiver configured to be coupled to an antenna, wherein the UWB receiver is further configured to receive at least a first packet and a second packet from an external communication system, wherein the first packet contains a predefined code and the second packet contains a cyclically shifted version of said predefined code; a processing unit configured to correlate the first packet and the second packet received by the UWB receiver with the predefined code. In accordance with further aspects, corresponding methods of operation are conceived, as well as computer programs for carrying out said methods.
1 . A communication system, comprising:
a first ultra-wideband, UWB, transmitter configured to be coupled to a first antenna;
a second UWB transmitter configured to be coupled to a second antenna;
a controller configured to cause the first UWB transmitter to transmit a first packet to an external communication device, wherein the first packet contains a predefined code;
wherein the controller is further configured to cause the second UWB transmitter to transmit a second packet to the external communication device, wherein the second packet contains a cyclically shifted version of said predefined code.
2 . The communication system of claim 1 , wherein the controller is further configured to cause the first UWB transmitter and the second UWB transmitter to transmit the first packet, respectively the second packet, simultaneously or substantially simultaneously to the external communication device.
3 . The communication system of claim 2 , wherein the predefined code is a code having ideal circular autocorrelation properties, in particular a ternary code.
4 . The communication system of claim 2 , wherein the controller is further configured to synchronize the first UWB transmitter and the second UWB transmitter before the first UWB transmitter transmits the first packet and the second UWB transmitter transmits the second packet.
5 . The communication system of claim 2 , further comprising at least one third UWB transmitter configured to be coupled to a third antenna, wherein the controller is further configured to cause the third UWB transmitter to transmit a third packet to the external communication device, wherein the third packet contains another cyclically shifted version of the predefined code.
6 . The communication system of claim 2 , forming part of an initiator in a localization system.
7 . The communication system of claim 1 , wherein the predefined code is a code having ideal circular autocorrelation properties, in particular a ternary code.
8 . The communication system of claim 1 , wherein the controller is further configured to synchronize the first UWB transmitter and the second UWB transmitter before the first UWB transmitter transmits the first packet and the second UWB transmitter transmits the second packet.
9 . The communication system of claim 1 , further comprising at least one third UWB transmitter configured to be coupled to a third antenna, wherein the controller is further configured to cause the third UWB transmitter to transmit a third packet to the external communication device, wherein the third packet contains another cyclically shifted version of the predefined code.
10 . The communication system of claim 1 , forming part of an initiator in a localization system.
11 . A method of operating a communication system, comprising:
causing, by a controller, a first ultra-wideband, UWB, transmitter to transmit a first packet to an external communication device, wherein the first packet contains a predefined code;
causing, by said controller, a second UWB transmitter to transmit a second packet to the external communication device, wherein the second packet contains a cyclically shifted version of said predefined code.
12 . A communication device, comprising:
an ultra-wideband, UWB, receiver configured to be coupled to an antenna, wherein the UWB receiver is further configured to receive at least a first packet and a second packet from an external communication system, wherein the first packet contains a predefined code and the second packet contains a cyclically shifted version of said predefined code;
a processing unit configured to correlate the first packet and the second packet received by the UWB receiver with the predefined code.
13 . The communication device of claim 12 , wherein the UWB receiver is configured to receive the first packet and the second packet simultaneously or substantially simultaneously.
14 . The communication device of claim 13 , wherein the processing unit is further configured to generate a channel impulse response, CIR, based on a result of correlating the first packet and the second packet with the predefined code.
15 . The communication device of claim 13 being a responder in a localization system.
16 . The communication device of claim 12 , wherein the processing unit is further configured to generate a channel impulse response, CIR, based on a result of correlating the first packet and the second packet with the predefined code.
17 . The communication device of claim 16 , wherein the processing unit is further configured to compute phase values associated with peaks included in the CIR, and to compute an angle of departure of the first packet and the second packet based on said phase values.
18 . The communication device of claim 12 , being a responder in a localization system.
19 . A method of operating a communication device, comprising:
receiving, by an ultra-wideband, UWB, receiver included in the communication device, at least a first packet and a second packet from an external communication system, wherein the first packet contains a predefined code, and the second packet contains a cyclically shifted version of said predefined code;
correlating, by a processing unit included in the communication device, the first packet and the second packet with the predefined code.