Wideband personal-radio recorder

摘要

Methods and apparatuses for concurrently recording multiple radio channels. A recorder includes a wideband tuner having a complex mixer for converting a received wideband RF signal to a complex signal that is then digitized. A digital front end module applies a number of complex down-mixers to the digital complex signal to generate the multiple radio channels in the baseband. Each one of the multiple radio channels in the baseband is further filtered, decimated and demodulated. A digital signal processing unit encodes each demodulated channel according to an audio compression format and stores the then encoded audio content to a storage unit. An RBDS decoder parses radio data service information associated with the stored audio content. The radio data service information is stored in a first section of the storage unit while the encoded audio content is stored in a second section of the storage unit.

主权项

1. A wideband multimedia recorder for recording a plurality of radio channels comprising:
a low-noise amplifier configured to concurrently receive a radio frequency signal associated with the plurality of radio channels; a first mixer configured to generate an in-phase signal from the radio frequency signal; a second mixer configured to generate a quadrature-phase signal from the radio frequency signal; an analog-to-digital converter configured to digitize the in-phase and quadrature-phase signals; a digital front end module configured to frequency down-convert the digitized in-phase and quadrature phase signals to a plurality of baseband radio channels; a demodulator configured to demodulate the plurality of baseband radio channels to generate a plurality of data streams; a digital signal processing circuitry configured to process the plurality of data streams; a storage unit configured to store the plurality of processed data streams; and a control configured to receive control commands from a user.