Radio transceiver on a chip
AssigneeTelefonaktiebolaget L M Ericsson (publ)
InventorsKarl Håkan Torbjörn Gardenfors, Sven Mattisson, Jacobus Cornelis Haartsen
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Abstract
An entire radio transceiver can be completely integrated into one IC chip. In order to integrate the IF filters on the chip, a heterodyne architecture with a low IF is used. A single, directly modulated VCO is used for both up-conversion during transmission, and down-conversion during reception. Bond-wires are used as resonators in the oscillator tank for the VCO. A TDD scheme is used in the air interface to eliminate cross-talk or leakage. A Gaussian-shaped binary FSK modulation scheme is used to provide a number of other implementation advantages.
Claims19
A radio on a single integrated circuit chip, comprising:
- an antenna section for transmitting at least one high frequency transmit signal and receiving at least one high frequency receive signal, the transmission of said at least one high frequency transmit signal segregated from the reception of said at least one high frequency receive signal using time division duplexing;
- a single heterodyne down-conversion section coupled to said antenna section, for down-converting each high frequency receive signal directly to a low intermediate frequency signal;
- a bandpass filter coupled to the down-conversion section for channel filtering the low intermediate frequency signal;
- a discriminator coupled to the bandpass filter for detecting a received data signal from the low intermediate frequency signal;
- a shaping filter for shaping a data signal to be transmitted;
- and
- a variable controlled oscillator coupled to the antenna section and to the shaping filter for generating the at least one high frequency transmit signal in response to the shaped data signal, wherein the variable controlled oscillator is further coupled to the down-conversion section for use in down-converting each high frequency receive signal.
Dependencies are inferred from the claim text.