An ultra-wideband, UWB, receiver module (213, 214) comprising: an antenna for wirelessly receiving UWB signalling from a UWB transmitter module; and a processor configured to: determine a channel impulse response, CIR, of the wirelessly received UWB signalling, wherein the CIR comprises a plurality of channel taps each having a tap-response-value; identify a predetermined feature in the CIR and an associated channel tap; and based on the channel tap that is associated with the identified feature in the CIR, synchronize the UWB receiver module (213, 214) for reception of subsequent UWB signalling; characterized in that: the plurality of channel taps of the CIR together represents a transmission symbol of the UWB transmitter module; and the processor is configured to synchronize the UWB receiver module (213, 214) for reception of subsequent UWB signalling by: determining a channel impulse response, CIR, of the received subsequent UWB signalling, wherein: the CIR comprises a set of channel taps based on the channel tap that is associated with the identified feature in the CIR, and wherein the set of channel taps is a subset of the plurality of channel taps that together represent the transmission symbol of the UWB transmitter module; and each of the set of channel taps has a tap-response-value; and processing the tap-response-values of the CIR of the received subsequent UWB signalling to identify any reflected versions of the subsequent UWB signalling. an antenna for wirelessly receiving UWB signalling from a UWB transmitter module; and a processor configured to: determine a channel impulse response, CIR, of the wirelessly received UWB signalling, wherein the CIR comprises a plurality of channel taps each having a tap-response-value; identify a predetermined feature in the CIR and an associated channel tap; and based on the channel tap that is associated with the identified feature in the CIR, synchronize the UWB receiver module (213, 214) for reception of subsequent UWB signalling; determine a channel impulse response, CIR, of the wirelessly received UWB signalling, wherein the CIR comprises a plurality of channel taps each having a tap-response-value; identify a predetermined feature in the CIR and an associated channel tap; and based on the channel tap that is associated with the identified feature in the CIR, synchronize the UWB receiver module (213, 214) for reception of subsequent UWB signalling; characterized in that: the plurality of channel taps of the CIR together represents a transmission symbol of the UWB transmitter module; and the processor is configured to synchronize the UWB receiver module (213, 214) for reception of subsequent UWB signalling by: determining a channel impulse response, CIR, of the received subsequent UWB signalling, wherein: the CIR comprises a set of channel taps based on the channel tap that is associated with the identified feature in the CIR, and wherein the set of channel taps is a subset of the plurality of channel taps that together represent the transmission symbol of the UWB transmitter module; and each of the set of channel taps has a tap-response-value; and processing the tap-response-values of the CIR of the received subsequent UWB signalling to identify any reflected versions of the subsequent UWB signalling. the plurality of channel taps of the CIR together represents a transmission symbol of the UWB transmitter module; and the processor is configured to synchronize the UWB receiver module (213, 214) for reception of subsequent UWB signalling by: determining a channel impulse response, CIR, of the received subsequent UWB signalling, wherein: the CIR comprises a set of channel taps based on the channel tap that is associated with the identified feature in the CIR, and wherein the set of channel taps is a subset of the plurality of channel taps that together represent the transmission symbol of the UWB transmitter module; and each of the set of channel taps has a tap-response-value; and processing the tap-response-values of the CIR of the received subsequent UWB signalling to identify any reflected versions of the subsequent UWB signalling. determining a channel impulse response, CIR, of the received subsequent UWB signalling, wherein: the CIR comprises a set of channel taps based on the channel tap that is associated with the identified feature in the CIR, and wherein the set of channel taps is a subset of the plurality of channel taps that together represent the transmission symbol of the UWB transmitter module; and each of the set of channel taps has a tap-response-value; and the CIR comprises a set of channel taps based on the channel tap that is associated with the identified feature in the CIR, and wherein the set of channel taps is a subset of the plurality of channel taps that together represent the transmission symbol of the UWB transmitter module; and each of the set of channel taps has a tap-response-value; and processing the tap-response-values of the CIR of the received subsequent UWB signalling to identify any reflected versions of the subsequent UWB signalling.