ASYMMETRICAL TRANSMITTER-RECEIVER SYSTEM FOR SHORT RANGE COMMUNICATIONS

摘要

Systems, methods, and devices relating to short range wireless communications. A host device wirelessly communicates with a user device. The transceiver on the host device is of a greater complexity than the transceiver on the user device. The host device performs a number of signal processing steps on data to be exchanged with the user device such that the complexity of the processing to be done by the user device is significantly reduced. This approach thereby reduces the complexity of the transceiver on the user device. The host device processing includes pre-channel equalization and pre-synchronization.

主权项

1. A method for asymmetrical wireless communications between a host device and a user device, the method comprising:
a) receiving a preamble transmission from a transmitter of said user device, said preamble transmission containing a predetermined preamble from said user device; b) determining communications parameters for a channel used in communicating between said host device and said user device, said communications parameters being determined by a receiver on said host device using said preamble; c) receiving the data to be transmitted from said host device to the said user device; d) applying a downlink error correcting code to said data; e) applying at least one pre-transmission process to said data to result in pre-processed data, said at least one pre-transmission process being for compensating for potential distortions due to said channel; f) transmitting said pre-processed data to said user device; wherein said downlink error correcting code applied to said data for transmission from said host device to said user device is different from an uplink error correcting code applied to data for transmission from said user device to said host device, said downlink error correcting code having a high encoder complexity and a low decoder complexity than said uplink error correcting code.