Abstract: A wireless communication system architecture communicates data between one or more first data points and one or more second data points via a wireless communication link extending from a first end to which the one or more first data points are connected and a second end to which the one or more second data points are connected. The wireless communication link includes a first RF communication channel and a second RF communication channel. The first RF communication channel is independent from the second RF communication channel, and the same data is transmitted from the one or more first data points to the one or more second data points along both the first RF communication channel and the second RF communication channel.

Abstract: A method of transmitting a message from a sender (101) to a receiver (102) is provided, wherein the communication between the sender (101) and receiver (102) is performed using a hybrid automatic-repeat-request (HARQ) protocol. Artificial noise is added digitally to a first data packet in order to trigger transmission of a second data packet. Corresponding artificial noise is added digitally to the second data packet such that the receiver device (102) can process the data packets together to remove the introduced artificial noise and extract the desired message. Also disclosed are methods where artificial noise is added to a predetermined set of plural data packets in a similar fashion.