WO2006065031A1 - Signal generator for multi-band uwb - Google Patents

Signal generator for multi-band uwb Download PDF

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Publication number
WO2006065031A1
WO2006065031A1 PCT/KR2005/004131 KR2005004131W WO2006065031A1 WO 2006065031 A1 WO2006065031 A1 WO 2006065031A1 KR 2005004131 W KR2005004131 W KR 2005004131W WO 2006065031 A1 WO2006065031 A1 WO 2006065031A1
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Prior art keywords
signal
divider
signals
mixer
mhz
Prior art date
Application number
PCT/KR2005/004131
Other languages
French (fr)
Inventor
Bong Hyuk Park
Seung Sik Lee
Jae Young Kim
Sang Sung Choi
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Electronics And Telecommunications Research Institue
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Publication of WO2006065031A1 publication Critical patent/WO2006065031A1/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B21/00—Generation of oscillations by combining unmodulated signals of different frequencies
    • H03B21/01—Generation of oscillations by combining unmodulated signals of different frequencies by beating unmodulated signals of different frequencies
    • H03B21/02—Generation of oscillations by combining unmodulated signals of different frequencies by beating unmodulated signals of different frequencies by plural beating, i.e. for frequency synthesis ; Beating in combination with multiplication or division of frequency
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L7/00—Automatic control of frequency or phase; Synchronisation
    • H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/7163—Spread spectrum techniques using impulse radio
    • H04B1/71632—Signal aspects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/7163—Spread spectrum techniques using impulse radio
    • H04B1/71635—Transmitter aspects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/7163—Spread spectrum techniques using impulse radio
    • H04B1/71637—Receiver aspects

Definitions

  • UWB ultra- wideband
  • RF radio-frequency
  • FIG. 1 is a functional block diagram of a conventional multi-band UWB signal generator.
  • the conventional multi-band UWB signal generator includes two voltage controlled oscillators 11 and 12, two switches 13 and 14, six /2 dividers 15-20, a /3 divider 21, and a mixer 22. According to a switch isolation degree, a lot of spurious signals are generated and various signals are simultaneously generated. Accordingly, there exists a small difference between a main signal and a noise signal.
  • the present invention is directed to a signal generator for a multi-band
  • a signal generator applied to a UWB direct-conversion RF transmission/reception apparatus includes: a voltage controlled generator for generating a signal of a 6 GHz band; a PLL (phase locked loop) for locking the 6 GHz band signal to an accurate signal of 6336 MHz; a /4 divider for dividing the 6336 MHz signal from the PLL at a division ratio of /4; an SSBl mixer for mixing the output signal from the /4 divider with the 6336 MHz signal from the PLL; a /2 divider for dividing the mixed signal from the SSBl mixer at a division ratio of /2; a prescaler for dividing the 6336 MHz signal from the PLL at a division ratio of /3, /4 or /6 according to an external selection signal; and an SSB2 mixer for mixing the output signal from the /2 divider with
  • Fig. 1 is a functional block diagram of a conventional multi-band UWB signal generator.
  • Fig. 2 is a functional block diagram of a multi-band UWB signal generator according to an embodiment of the present invention.
  • Fig. 3 is a functional block diagram of an SSBl mixer in the multi-band UWB signal generator illustrated in Fig. 2.
  • Fig. 4 is a functional block diagram of an SSB2 mixer in the multi-band UWB signal generator illustrated in Fig. 2.
  • Fig. 5 is a functional block diagram of a prescaler in the multi-band UWB signal generator illustrated in Fig. 2. [19]
  • Fig. 2 is a functional block diagram of a multi-band UWB signal generator according to an embodiment of the present invention.
  • VCO voltage controlled oscillator
  • PLL phase locked loop
  • the 1.5 GHz band signal from the /4 divider 130 is mixed with the 6336 MHz signal from the PLL 120 at a single sideband (SSB)I mixer 150 and is thus converted into a signal of a 4.7 GHz band.
  • the 4.7 GHz band signal from the SSB 1 mixer 150 is converted into a signal of a 2.3 GHz band at a /2 divider 160.
  • the 2.3 GHz band signal from the /2 divider 160 is inputted into an SSB2 mixer 180.
  • the two signals inputted into the SSB2 mixer 180 are respectively combined into desired signals of 3432 MHz, 3960 MHz and 4488 MHz.
  • Table 1 below shows a center frequency (of each channel) of the signals generated from the multi- band UWB signal generator.
  • Fig. 3 is a functional block diagram of the SSBl mixer 150 in the multi-band UWB signal generator illustrated in Fig. 2.
  • an RF signal inputted into a polyphase filter 151 is converted into I (in-phase)/Q (quatrature-phase) signals.
  • the I/Q signals from the polyphase filter 151 are mixed with I/Q signals from the /4 divider 130 at mixers 152 and 153.
  • the mixed signals from the mixers 152 and 153 are amplified at an amplifier 154, and the amplified signals are inputted into the /2 divider 160.
  • Fig. 4 is a functional block diagram of the SSB2 mixer 180 in the multi-band UWB signal generator illustrated in Fig. 2.
  • an RF signal inputted into a polyphase filter 181 is converted into I/Q signals.
  • the I/Q signals from the polyphase filter 181 are mixed with I/Q signals from the /2 divider 160 at mixers 182, 183, 184 and 185, and the mixed signals are amplified at amplifiers 186 and 187.
  • Fig. 5 is a functional block diagram of the prescaler 170 in the multi-band UWB signal generator illustrated in Fig. 2.
  • One of the /3, /4 and /6 dividers in the prescaler 170 are selected by the external selection signal.
  • the /3 divider is selected from a /2 or /3 divider block 171 by an external selection signal MCl.
  • the output signal from the selected /3 divider is selected by an selection signal MC2 at a 2:1 multiplexer (MUX) 173, and the selected signal is inputted into the SSB2 mixer 180.
  • the /2 divider is selected from the /2 or /3 divider block 171 by the external selection signal MCl.
  • the output signal from the selected /2 divider is inputted into a /2 divider 172.
  • the output signal from the /2 divider 172 is selected by the external selection signal MC2 at the 2:1 MUX 173, and the selected signal is inputted into the SSB2 mixer 180.
  • the /3 divider is selected from the /2 or /3 divider block 171 by the external selection signal MCl.
  • the output signal from the selected /3 divider is inputted into the /2 divider 172.

Abstract

Provided is a signal generator applied to a UWB direct-conversion RF transmission/reception apparatus. The signal generator includes a voltage controlled generator 110 for generating a signal of a 6 GHz band, a PLL 120 for locking the 6 GHz band signal to an accurate signal of 6336 MHz, a /4 divider 130 for dividing the 6336 MHz signal from the PLL 120 at a division ratio of /4, an SSB l mixer 150 for mixing the output signal from the /4 divider 130 with the 6336 MHz signal from the PLL 120, a /2 divider 160 for dividing the mixed signal from the SSBl mixer 150 at a division ratio of /2, a prescaler 170 for dividing the 6336 MHz signal from the PLL 120 at a division ratio of /3, /4 or /6 according to an external selection signal, and an SSB2 mixer 180 for mixing the output signal from the /2 divider 160 with the divided signal from the prescaler 170. Accordingly, it is possible to minimize generation of spurious signals and harmonic signals by generation of only one channel signal at the time of 't=tl' and to reduce power consumption and a design area by minimization of the number of required components. Consequently, the signal generator can be manufactured at a low cost.

Description

Description
SIGNAL GENERATOR FOR MULTI-BAND UWB
Technical Field
[1] The present invention relates to a signal generator applied to a multi-band ultra- wideband (UWB) direct-conversion radio-frequency (RF) transmission/reception apparatus, and more particularly, to a signal generator for a multi-band UWB, which does not uses a switch by selection of a division ratio of a prescaler according to an external selection signal, minimizes generation of spurious signals and harmonic signals by generation of only one channel signal at the time of "t=tl", reduces power consumption and a design area by minimization of the number of required components, and thus can be manufactured at a low cost.
[2]
Background Art
[3] Fig. 1 is a functional block diagram of a conventional multi-band UWB signal generator.
[4] Referring to Fig. 1, the conventional multi-band UWB signal generator includes two voltage controlled oscillators 11 and 12, two switches 13 and 14, six /2 dividers 15-20, a /3 divider 21, and a mixer 22. According to a switch isolation degree, a lot of spurious signals are generated and various signals are simultaneously generated. Accordingly, there exists a small difference between a main signal and a noise signal.
[5] In the conventional multi-band UWB generator, many channels periodically hop during a very short time. Accordingly, when many channels coexist, a lot of noise signals are generated due to an inter-channel effect and a hopping time of several nsec cannot be satisfied due to a PLL locking time of several tens μsec.
[6]
Disclosure of Invention Technical Problem
[7] Accordingly, the present invention is directed to a signal generator for a multi-band
UWB, which substantially obviates one or more problems due to limitations and disadvantages of the related art.
[8] It is an object of the present invention to provide a signal generator for a multi-band
UWB, which satisfies a hopping time, generates only one channel signal at the time of "t=tl" by selection of a division ratio of a prescaler according to an external selection signal, reduces power consumption and a design area by minimization of the number of required components (e.g. switches), and thus can be manufactured at a low cost.
[9] Technical Solution
[10] To achieve these objects and other advantages and in accordance with the purpose of the invention, as embodied and broadly described herein, there is provided a signal generator applied to a UWB direct-conversion RF transmission/reception apparatus, the signal generator includes: a voltage controlled generator for generating a signal of a 6 GHz band; a PLL (phase locked loop) for locking the 6 GHz band signal to an accurate signal of 6336 MHz; a /4 divider for dividing the 6336 MHz signal from the PLL at a division ratio of /4; an SSBl mixer for mixing the output signal from the /4 divider with the 6336 MHz signal from the PLL; a /2 divider for dividing the mixed signal from the SSBl mixer at a division ratio of /2; a prescaler for dividing the 6336 MHz signal from the PLL at a division ratio of /3, /4 or /6 according to an external selection signal; and an SSB2 mixer for mixing the output signal from the /2 divider with the divided signal from the prescaler.
[H]
Advantageous Effects
[12] As described above, the multi-band UWB signal generator does not uses a switch by selection of a division ratio of a prescaler according to an external selection signal, minimizes generation of spurious signals and harmonic signals by generation of only one channel signal at the time of "t=tl", reduces power consumption and a design area by minimization of the number of required components, and thus can be manufactured at a low cost. [13]
Brief Description of the Drawings [14] Fig. 1 is a functional block diagram of a conventional multi-band UWB signal generator. [15] Fig. 2 is a functional block diagram of a multi-band UWB signal generator according to an embodiment of the present invention. [16] Fig. 3 is a functional block diagram of an SSBl mixer in the multi-band UWB signal generator illustrated in Fig. 2. [17] Fig. 4 is a functional block diagram of an SSB2 mixer in the multi-band UWB signal generator illustrated in Fig. 2. [18] Fig. 5 is a functional block diagram of a prescaler in the multi-band UWB signal generator illustrated in Fig. 2. [19]
Best Mode for Carrying Out the Invention [20] Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. [21] Fig. 2 is a functional block diagram of a multi-band UWB signal generator according to an embodiment of the present invention. [22] Referring to Fig. 2, a signal generated at a voltage controlled oscillator (VCO) 110 is locked to an accurate signal of 6336 MHz at a phase locked loop (PLL) 120. The 6336 MHz signal from the PLL 120 is converted into a signal of a 1.5 GHz band by a / 4 divider 130 configured with two /2 dividers. The 1.5 GHz band signal from the /4 divider 130 is mixed with the 6336 MHz signal from the PLL 120 at a single sideband (SSB)I mixer 150 and is thus converted into a signal of a 4.7 GHz band. The 4.7 GHz band signal from the SSB 1 mixer 150 is converted into a signal of a 2.3 GHz band at a /2 divider 160. The 2.3 GHz band signal from the /2 divider 160 is inputted into an SSB2 mixer 180.
[23] Meanwhile, the 6336 MHz signal from the PLL 120 is divided into a 2112 MHz signal, a 1584 MHz signal and a 1056 MHz signal respectively by a /3 divider, a /4 divider and a /6 divider of a prescaler 170 selected by an external selection signal, and only one of the divided signals is inputted into the SSB2 mixer 180 at the time of "t=tl". At this point, the two signals inputted into the SSB2 mixer 180 are respectively combined into desired signals of 3432 MHz, 3960 MHz and 4488 MHz. Table 1 below shows a center frequency (of each channel) of the signals generated from the multi- band UWB signal generator.
[24] Table 1
Figure imgf000005_0001
[25] [26] Fig. 3 is a functional block diagram of the SSBl mixer 150 in the multi-band UWB signal generator illustrated in Fig. 2.
[27] Referring to Fig. 3, an RF signal inputted into a polyphase filter 151 is converted into I (in-phase)/Q (quatrature-phase) signals. The I/Q signals from the polyphase filter 151 are mixed with I/Q signals from the /4 divider 130 at mixers 152 and 153. The mixed signals from the mixers 152 and 153 are amplified at an amplifier 154, and the amplified signals are inputted into the /2 divider 160.
[28] Fig. 4 is a functional block diagram of the SSB2 mixer 180 in the multi-band UWB signal generator illustrated in Fig. 2. [29] Referring to Fig. 4, an RF signal inputted into a polyphase filter 181 is converted into I/Q signals. The I/Q signals from the polyphase filter 181 are mixed with I/Q signals from the /2 divider 160 at mixers 182, 183, 184 and 185, and the mixed signals are amplified at amplifiers 186 and 187.
[30] Fig. 5 is a functional block diagram of the prescaler 170 in the multi-band UWB signal generator illustrated in Fig. 2. One of the /3, /4 and /6 dividers in the prescaler 170 are selected by the external selection signal.
[31] An operation of each of the above dividers will now be described with reference to
Fig. 5.
[32] For /3 division operation, the /3 divider is selected from a /2 or /3 divider block 171 by an external selection signal MCl. The output signal from the selected /3 divider is selected by an selection signal MC2 at a 2:1 multiplexer (MUX) 173, and the selected signal is inputted into the SSB2 mixer 180. For /4 division operation, the /2 divider is selected from the /2 or /3 divider block 171 by the external selection signal MCl. The output signal from the selected /2 divider is inputted into a /2 divider 172. The output signal from the /2 divider 172 is selected by the external selection signal MC2 at the 2:1 MUX 173, and the selected signal is inputted into the SSB2 mixer 180. For /6 division operation, the /3 divider is selected from the /2 or /3 divider block 171 by the external selection signal MCl. The output signal from the selected /3 divider is inputted into the /2 divider 172. The output signal from the /2 divider 172 is selected by the external selection signal MC2 at the 2:1 MUX 173, and the selected signal is inputted into the SSB2 mixer 180. Consequently, only one of many channels exists at the time of "t=tl", thereby suppressing a spurious signal and a harmonic signal.
[33] It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention. Thus, it is intended that the present invention covers the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

Claims

Claims
[1] A signal generator applied to a UWB direct-conversion RF transmission/ reception apparatus, the signal generator comprising: a voltage controlled generator for generating a signal of a 6 GHz band; a PLL (phase locked loop) for locking the 6 GHz band signal to an accurate signal of 6336 MHz; a /4 divider for dividing the 6336 MHz signal from the PLL at a division ratio of
/4; an SSBl mixer for mixing the output signal from the /4 divider with the 6336
MHz signal from the PLL; a /2 divider for dividing the mixed signal from the SSB 1 mixer at a division ratio of /2; a prescaler for dividing the 6336 MHz signal from the PLL at a division ratio of /
3, /4 or /6 according to an external selection signal; and an SSB2 mixer for mixing the output signal from the /2 divider with the divided signal from the prescaler. [2] The signal generator of claim 1, wherein the SSBl mixer includes: a polyphase filter for receiving and converting an RF signal into I/Q signals; two mixers for mixing the I/Q signals from the polyphase filter with I/Q signals from the /4 divider; and an amplifier for amplifying the mixed signals from the two mixers. [3] The signal generator of claim 1, wherein the SSB2 mixer includes: a polyphase filter for receiving and converting an RF signal into I/Q signals of a differential mode; four mixers for mixing the differential mode I/Q signals from the polyphase filter with differential mode I/Q signals from the /2 divider; and an amplifier for amplifying the mixed differential mode I/Q signals from the four mixers. [4] The signal generator of claim 1, wherein the prescaler includes: a /2 or /3 divider for selecting a division ratio according to an external selection signal; a /2 divider for dividing the output signal from the /2 or /3 divider; and a 2: 1 MUX for selecting one of the two output signals from the /2 or /3 divider and the /2 divider and outputting the selected signal to the SSB2 mixer.
PCT/KR2005/004131 2004-12-15 2005-12-06 Signal generator for multi-band uwb WO2006065031A1 (en)

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Cited By (2)

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Publication number Priority date Publication date Assignee Title
WO2007071822A1 (en) * 2005-12-20 2007-06-28 Nokia Siemens Networks Oy Frequency generator arrangement
WO2013176780A1 (en) * 2012-05-21 2013-11-28 Raytheon Company Hybrid dual mode frequency synthesizer circuit

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100883382B1 (en) * 2007-09-20 2009-02-11 한양대학교 산학협력단 Frequency synthesizing device of ultra wide band system

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WO2004017547A2 (en) * 2002-08-16 2004-02-26 Wisair. Ltd. Multi-band ultra-wide band communication method and system

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WO2004017547A2 (en) * 2002-08-16 2004-02-26 Wisair. Ltd. Multi-band ultra-wide band communication method and system

Non-Patent Citations (1)

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Title
BATRA A ET AL: "Multi-band OFDM : a new approach for UWB.", CIRCUITS AND SYSTEMS, 2004. ISCAS 0'4., vol. 5, 23 May 2004 (2004-05-23) - 26 May 2004 (2004-05-26), pages V-365 - V-368 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007071822A1 (en) * 2005-12-20 2007-06-28 Nokia Siemens Networks Oy Frequency generator arrangement
US7268640B2 (en) 2005-12-20 2007-09-11 Nokia Corporation Frequency generator arrangement
WO2013176780A1 (en) * 2012-05-21 2013-11-28 Raytheon Company Hybrid dual mode frequency synthesizer circuit
US8754697B2 (en) 2012-05-21 2014-06-17 Raytheon Company Hybrid dual mode frequency synthesizer circuit

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KR20060067724A (en) 2006-06-20

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