Asymmetrical transmitter-receiver system for short range communications
AssigneeThe University of Western Ontario
InventorsXianbin WANG, Ahmed Rafaey HUSSEIN
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Abstract
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.
Claims31
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.
A method for asymmetrical wireless communications between a host device and a user device, the method comprising:
- a) determining a transmission time between said user device and said host device based on an instruction from said host device to said user device;
- b) receiving data to be transmitted from said user device to said host device;
- c) applying an uplink error correcting code to said data;
- d) transmitting said data from a user device transmitter to a host device receiver;
- wherein
- said uplink error correcting code applied to said data for transmission from said user device to said host device is different from a downlink error correcting code applied to data for transmission from said host device to said user device, said uplink error correcting code having a lower encoder complexity and a higher decoder complexity than said downlink error correcting code.
A system for use in short range wireless communications, the system comprising:
- a host device having a host transmitter and a host receiver;
- a user device having a user transmitter and a user receiver;
- wherein
- said host transmitter transmits to said user receiver by way of a specific channel using a downlink error correcting code;
- said user transmitter transmits to said host receiver by way of said specific channel using an uplink error correcting code;
- said uplink error correcting code is different from said downlink error correcting code;
- said host transmitter applies at least one pre-transmission process to data to be transmitted to said user device to result in pre-processed data, said at least one pre-transmission process being for compensating for potential issues due to said specific channel.
Dependencies are inferred from the claim text.