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US 6,633,550 B1Granted
Radio transceiver on a chip
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsKarl Håkan Torbjörn Johansson Gärdenfors, Sven Mattisson, Jacobus Cornelis Haartsen
Life of this patent
Estimating the term…
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.
Claims17
A radio on a single IC chip, comprising:
- an antenna section for transmitting and receiving a plurality of high frequency signals, said radio including means for transmitting and receiving said plurality of high frequency signals in a time division duplex mode;
- a single heterodyne down-conversion section coupled to said antenna section, for down-converting directly from a first high frequency signal of said plurality of high frequency signals to a low intermediate frequency signal;
- a bandpass filter coupled to said down-conversion section;
- a discriminator coupled to said bandpass filter for detecting a received data signal from said low intermediate frequency signal;
- an up-conversion section coupled to said antenna section, for up-converting an information signal to a second high frequency signal of said plurality of high frequency signals, said up-conversion section comprising a portion of said down-conversion section;
- a shaping filter coupled to an input of said up-conversion section;
- and
- said down-conversion section, bandpass filter, discriminator, up-conversion section and shaping filter integrated into said single IC chip, wherein bandpass filtering operations are performed by components integrated into said single IC chip.
5 more elements
A radio on a single IC chip, comprising:
- an antenna section for transmitting and receiving a plurality of high frequency signals, said radio including means for transmitting and receiving said plurality of high frequency signals in a time division duplex mode;
- a down-conversion section coupled to said antenna section, for down-converting a first high frequency signal of said plurality of high frequency signals to a low intermediate frequency signal;
- a bandpass filter coupled to said down-conversion section;
- a discriminator coupled to said bandpass filter;
- an up-conversion section coupled to said antenna section, for up-converting an information signal to a second high frequency signal of said plurality of high frequency signals, wherein said up-conversion section and said down-conversion section comprise a single variable controlled oscillator;
- and
- said variable controlled oscillator integrated into said single IC chip, wherein resonators are implemented for said variable controlled oscillator without components external to said single IC chip;
- and
- a shaping filter coupled to an input of said up-conversion section.
6 more elements
A radio on a single IC chip, comprising:
- an antenna section for transmitting and receiving a plurality of high frequency signals, said high frequency signals transmitted and received in accordance with a frequency hopping scheme for providing interference immunity;
- a down-conversion section coupled to said antenna section, for down-converting a first high frequency signal of said plurality of high frequency signals to a low intermediate frequency signal;
- a bandpass filter coupled to said down-conversion section;
- a discriminator coupled to said bandpass filter;
- an up-conversion section coupled to said antenna section, for up-converting an information signal to a second high frequency signal of said plurality of high frequency signals, said up-conversion section comprising a portion of said down-conversion section;
- a shaping filter coupled to an input of said up-conversion section;
- wherein said frequency hopping scheme is carried out on a plurality of frequencies;
- means for transmitting and receiving said plurality of high frequency signals in a time division duplex mode, wherein each of a plurality of duplex frames occurs at a different hop frequency;
- and
- wherein said high frequency signals are modulated using binary Gaussian-shaped frequency shift keying.
7 more elements
Dependencies are inferred from the claim text.