Digital mobile radio with enhanced transceiver
AssigneeAnalog Devices International Unlimited Company
InventorsJian Wang, Yong Wang, Haijiao Fan, Reza Alavi, Abdelaziz Chihoub, Esha John, Saeed Aghtar
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Abstract
Apparatuses and methods related to digital mobile radio (DMR) with enhanced transceiver are disclosed herein. The transceiver detects waveforms of signals received by a digital mobile station radio (MS). By detecting whether the waveforms of the signals, the transceiver allows a digital baseband processor of the MS to remain in a sleep state while the signals are being detected by the DMR, thereby reducing an amount of power used while the signals are being detected.
Claims20
A method to detect signals by a transceiver coupled to a digital baseband processor, comprising:
- while digital baseband processor is in a sleep state, receiving and sampling signals by the transceiver;
- determining a received signal strength indicator based on the received signals;
- performing correlation operations of samples of the received signals with different frame synchronization codes;
- buffering outputs of the correlation operations and the samples of the received signals in a storage;
- and
- triggering a wake-up of the digital baseband processor, and providing the samples of the received signals buffered in the storage to the digital baseband processor based on the received signal strength indicator exceeding a threshold.
A method to detect signals by a transceiver coupled to a digital baseband processor, comprising:
- while digital baseband processor is in a sleep state and during a wake period of the transceiver, receive signals by the transceiver;
- producing, by the transceiver, processed data from the received signals;
- identifying a land mobile radio signal from the processed data;
- and
- in response to identifying the land mobile radio signal, triggering a wake-up of the digital baseband processor, and disabling one or more correlation processors not operating with land mobile radio signal frame synchronization codes.
A transceiver in electrical communication with a digital baseband processor, comprising:
- a receiver channel to receive signals from an antenna while the digital baseband processor is in a sleep state;
- a communication processing circuitry to process signals received by the receiver channel, including detecting one or more of:
- land mobile radio signal, and frequency modulation signal;
- a storage device to store data associated with the received signals and provide the data to the digital baseband processor while the digital baseband processor is in an active state;
- and
- a correlator component having independent correlation processors operating in parallel, wherein a given correlation processor correlates a sample of the received signals against a frame synchronization code corresponding to the given correlation processor.
Dependencies are inferred from the claim text.