WO1997035397A1 - Frequency hopping radiocommunication system and synchronous catching method - Google Patents

Frequency hopping radiocommunication system and synchronous catching method

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Publication number
WO1997035397A1
WO1997035397A1 PCT/JP1996/000679 JP9600679W WO9735397A1 WO 1997035397 A1 WO1997035397 A1 WO 1997035397A1 JP 9600679 W JP9600679 W JP 9600679W WO 9735397 A1 WO9735397 A1 WO 9735397A1
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WO
Grant status
Application
Patent type
Prior art keywords
frequency
sequence
hopping
hop
period
Prior art date
Application number
PCT/JP1996/000679
Other languages
French (fr)
Japanese (ja)
Inventor
Yasuo Ogoshi
Ritsuko Sasae
Masahiro Ito
Original Assignee
Hitachi, Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04JMULTIPLEX COMMUNICATION
    • H04J13/00Code division multiplex systems
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B1/00Details 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
    • H04B1/69Spread spectrum techniques
    • H04B1/713Spread spectrum techniques using frequency hopping

Abstract

A frequency hopping radiocommunication system for transmitting and receiving signals while periodically hopping a carrier wave frequency in accordance with a predetermined hopping sequence, comprises a frequency synthesizer (50) for switching the frequency of the output signal, a detection circuit (32) for detecting a reception signal at the output signal frequency from the frequency synthesizer, a demodulation circuit (35) for demodulating the reception signal from the output of the detection circuit, and a hopping controller (55) for controlling the synthesizer. The hopping controller has a low speed hopping mode (102 to 106) for instructing the frequency synthesizer to switch the frequency for a predetermined cycle in accordance with a hopping frequency sequence which defines a hop sequence for different frequencies, and a high speed hopping mode (121 to 135) for instructing the frequency synthesizer to switch the frequency at a switching rate substantially corresponding to one cycle of the sense frequency sequence during the duration for which each carrier wave frequency continues in accordance with a sense frequency sequence which defines a hop sequence of a limited number of frequencies existing in discrete hop positions in the hopping frequency sequence. When the carrier is detected from the detection circuit output while the frequency synthesizer outputs a specific frequency in the high speed hopping mode, the operation mode is switched to the low speed hopping mode, using the hop position corresponding to a specific frequency in the hopping frequency sequence as the starting point.

Description

Specification

Frequency hobbing wireless communication system and a synchronous acquisition method technology partial field

The present invention relates to wireless communication systems, and more particularly, to frequency hobbing wireless communication system and a synchronous acquisition method for communicating with hop a carrier frequency according to a communication device a predetermined hot Bing sequence of sender and receiver. Background technology

Spread spectrum communication method is a communication method for transmitting and diffusing the base one spanned bandwidth by remote wider frequency band transmission signal, that has excellent interference resistance and confidentiality. The spread spectrum communication system, "and the direct diffusion system j to spread the scan Bae-vector I by replacing each symbol (bit) spreading code comprised of a plurality Chi-up of the transmission signal, the transmission of the intermediate frequency band signal Ri by the output frequency (carrier frequency) of the station oscillator for frequency-converting the radio frequency band and periodically hopping child spreads the spectrum there is a "frequency hopping".

In the communication system of the frequency hop Bing scheme according to the transmission side communication apparatus and the receiving-side communication instrumentation ¾ and force same hopping sequence (hopping pattern) is hop in synchronism with each other for transmission and detection frequencies. The hopping sequence of carrier frequencies at this time is used, there are a relatively short cycle period, and one with a long repetition period in order to improve confidentiality. Even when hot Pingushi Ichike Nsu is either above, the receiving-transmitting-side carrier frequency currently in use to determine which frequencies in the hot Bing sequence in Sotategami, the detecting frequency of synchronization acquisition technique for synchronizing the transmitting side hopping timing is important. One conventional hopping synchronization method, for example, sea urchin by that shown in FIG. 1, Shin-side instrumentation feed is, F (1), F (2), ...... F (j), F (j + 1) , ... in hopping sequence F (n), by changing the carrier frequency for each predetermined time Q T h, the receiving side instrumentation ¾ is, the detection frequencies stop frequency hopping operation specific frequency (hereinafter, the detection output is monitored while held at the standby frequency of) f (w), the carrier frequency of the received signal from the state change of the detection output (wire carrier Riasensu output) is detected to be matched to the standby frequency f (w) point (in FIG. 1, hopping frequency F (j) and became time) starts hopping operation from, ensure that the frequency of the transmission recipient matches to a Jo Tokoro number of hops RenMitsuruteki synchronization is known "stand-by type of hopping synchronization scheme J I was sea urchin to shift to a holding state It has been.

An example of this good Una wait type synchronous capture technology, for example, the landlord Takahiro, et al., "Study on FH-SS communication synchronization acquisition method in which the frequency waiting", Electronics, Information and Communication Engineers Technical report, vol.94, Nanba281, spread spectrum 94-54, pp. are described in l~6 (1994 years).

Figure 2 is prepared n types of frequencies as a hop possible frequencies, by repeating F a (l) Ca ゝ Luo hopping sequence of F (n) to the n-hop periodically, one after the carrier frequency It shows a relatively short period frequency hopping pattern was due Unishi switching with.

The hopping pattern of the short period, each frequency is only once in one cycle period of the hopping sequence not being used. Therefore, when adopting the synchronous acquisition method for standby type described above in the communication system using the short-period hopping pattern, e.g., tie immediately after the sending device has hops to the next frequency on the receiving side waits frequency f (w) of the carrier frequency in Mi ring, if the receiving apparatus starts the synchronization acquisition operation, until a successful wire carrier re Athens on the receiving side, it is necessary hopping sequence one period (n hops) worth of time. Further, as the period during which the carrier frequency of the transmission side coincides with the standby frequency, if example embodiment, when the radio wave received by the noise and jammers like hindered, not come around the wire carrier re Athens chance only after further 1 cycle There's a problem.

That is, the synchronization acquisition method of a conventional stand type, the maximum value of the calibration Riasensu time required is proportional to the hopping sequence length (hopping number n of one period), even with a small hop count n, each carrier the duration of each frequency (hereinafter referred to as inter-hop-life) the higher the T h is long and requires a long time to the acquisition. For this reason, in a wireless communication system unacceptable only one period by remote much shorter time hopping sequence synchronization 埔捉, hobbing synchronous acquisition method for the standby type becomes powerless.

- How, as an alternative to hopping synchronization acquisition scheme stand type, for example, Japanese Patent Rights 6 2 6 1 0 2 0 JP Uni I are described in, hop period of the carrier frequency on the transmission side T h within, by operating high speed hot Bing recipient instrumentation S is had all frequencies Nitsu of hot Bing sequence, there was so out find the carrier frequency of the received signal "high-speed search type synchronous acquisition method."

However, in the conventional high-speed search type synchronous acquisition method, hop period T h of the receiving side at the time of synchronization acquisition 'is, relationship between the number n of hop period T h and hop frequency of the transmitting side (T h' = T h / n) by KOR Ri, for example, when hopping rate of the sender hopping inter Pal T h 'of the receiving side to the high damage has decreased extremely short, switching the switching operation of the output frequency of the frequency synthesizer not keep up with the command. Alternatively technical problems such as not sufficient calibration re Athens output is obtained is generated, Therefore, the high-speed search method, a special frequency switching of the carrier frequency on the transmission side is performed at low speed It has been effective in the hopping communication.

An object of the present invention is to provide a short frequency can capture hot Bing frequency hobbing wireless communication systems and wire carrier re Athens method.

Another object of the present invention, provides a hot Bing one period by remote short allowable frequency ho that can be synchronized with the transmitting side the recipient of frequency hobbing operation within the time Bbingu wireless communication system and a synchronous acquisition method sequence It is to.

Still another object of the present invention, the transmitting device transmits a synchronization control information in the same period of a predetermined number of hops that preceded data transmission, the receiving side apparatus the synchronization acquisition of hot Bing frequency within the synchronization period completed, there followed Unishi was frequency hop probing radio communication system and by performing data reception of the synchronization acquisition method suitable to it and provide child.

Still another object of the present invention, in particular, in a wireless communication system that periodically hopping the carrier frequency according to a predetermined hot Bing sequence using the transmitting apparatus is once n types of frequencies to each one period, a frequency sequence 1 cycle of

And to provide a (n hops) good remote much shorter predetermined number of frequency hop Bing period 內 synchronous acquisition instrumentation g and Acquisition Scheme achievable synchronization acquisition to. Inventions of disclosure

To achieve the above object, the synchronization acquisition method in the frequency hop Bing of the present invention, the receiving side apparatus, a hot Bing frequency sequence that defines a hop sequence for a plurality of different frequencies, from each other in the hot Bing frequency sequence discrete the e Tsu leave Ki慷 a sense frequency sequence that defines a hop sequence for frequencies limited number in the flop position, the transmission side apparatus, the transmission signal in accordance with hopping frequency sequence and the same sequence of frequencies of the reception side periodically switching the carrier frequency, the receiving side So釁 is above according sense sequence of frequencies, at approximately one period of the switching speed of the sense sequence of frequencies within TsugiMitsuru period of each carrier frequency, fast hopping the receiving frequency and, when a successful Canon Li Athens in a particular sense frequency Starting from the hop location corresponding to the specific cell Nsu frequency in the hopping frequency sequence, characterized in that it shifts the frequency hobbing operation in accordance with the hobbing frequency shea one Ke Nsu. In a preferred embodiment of the present invention, when a successful wire carrier Riasensu in the specific sense frequency, receiving device, starting from the hop location corresponding to the specific frequency in hopping frequency sequence, the next hop for reception frequency switching to the frequency of the position, when the career is detected within a predetermined time, the process proceeds to periodic frequency hopping operation in accordance with the hopping frequency is one cans. As the above-mentioned sense sequence of frequencies, for example, a sequence consisting of a plurality of frequencies spaced at a predetermined hop intervals in the hopping frequency sequence is applied, the number of the sense frequency, for example, to form the hopping frequency sequence determining a number of frequencies, by the hop count of the carrier frequency allowed for the synchronization acquisition. In a preferred operation example of the wireless communication system applying the synchronization acquisition method of the present invention, the transmission side instrumentation is, the frequency hopping period predetermined number of times prior to data transmission, and transmits the synchronization control packet comprising synchronization control information, the receiving side instrumentation s is, when a transition to a frequency hobbing operation in accordance with the hopping frequency sequence, to adjust the hopping timing by using the synchronization control information in the received bucket bets. Incidentally, the sending device, to notify the remaining number of hops up to the start of data transmission by the synchronous control bucket bets, the receiving side instrumentation S, also be controlled an initiation of a data receiving operation based on the remaining number of hops Information it can.

Frequency hot Bing wireless communication system according to the present invention, processing the frequency synthesizer changing disconnect the frequency of the output signal, and a detection circuit for detecting a received signal at the output signal frequency from the frequency synthesizer, an output signal of the detector circuit a demodulation circuit for demodulating a received signal, according hobbing frequency sequence defines a hop sequence for a plurality of different frequencies, and slow hobbing control means for instructing the switching of the frequency in a predetermined period to said frequency synthesizer, said hobbing frequency accordance sense frequency sequence defines a hop sequence for frequencies limited number in the discrete-hop position ¾ in sequence, with approximately one period of the switching speed of the sense sequence of frequencies to the next integration period 內 of each carrier frequency, said switching frequency to the frequency synthesizer And fast hobbing control means for instructing the place, in the frequency synthesizer with hot Pingumo one de by the upper Symbol fast hopping means outputs the frequency of specific, when the wire carrier re § is detected from the detection circuit output, starting from the hop location corresponding to the specific frequency in the hot Bing frequency sequence, characterized in that example 俯 and Ho Tsu Bing mode switching means for switching the hopping mode by the low speed hobbing means. Figure surface easy single a description of the

Figure 1 is a diagram for explaining a wire carrier Riasensu method of the conventional stand type, Figure 2 is a diagram illustrating an example of a frequency hop Bing sequence,

Figure 3 is a diagram for explaining a relationship between a frequency hopping sequence and relieved Bing synchronization period and data transmission and reception period Q in the wireless communication system of the present invention, Fig. 4, illustrating the calibration re Athens process according to the invention Figure for, Fig. 5, block diagram showing one embodiment of the transmission circuit main unit in the wireless communication system of the present invention,

Figure 6 is a block diagram showing an embodiment of a receiver circuit main unit in the wireless communication system of the present invention,

Figure 7 is a detailed view of the calibration Riasensu circuit 4 0 shown in FIG. 6,

Figure 8 is a diagram showing an example of hopping patterns Te one table,

Figure 9 is a diagram showing an embodiment of sense patterns Te one table,

The first 0 Figure is a diagram for explaining the relationship between the frequency hopping sequence and the sense sequence of frequencies,

The first 1 figure shows a transmission bucket Bok in hot Bing synchronization period, the first FIG. 2 is a flow chart illustrating a hopping synchronization acquisition procedure performed in the receiving circuit in a radio communication system of the present invention. The most good of shape state of order that the inventions were you implementation

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

Figure 3 illustrates a hot Pindashike Nsu carrier frequencies in the radio communication system of the present invention, a hopping synchronization period T s allowed for the receiving device, the relation between the between the data transmission and reception period T d.

Here, using the n types of carrier frequencies, up to one period of the frequency hopping sequence consists of n hops from F (l) to F (n), is the carrier frequency to hop to the next frequency from one frequency period (hop period T h) is, for example, several sheet Nporu (bit) about data transmission possible length of the total time of the hopping synchronization period T s and the data transmission and reception period T d, hobbing also a short one Ri by the sequence period.

In the example shown here, are three 0 hop period der from third hop F hopping synchronization period T s power hopping in the sequence (3) to the third two-hop F (3 2), data transmission and reception period T d is , a 1 0 0 hop period from the third three-hop F (3 3) to the first 3 2-hop F (1 3 2), a period of "T s + T d", one cycle of the hot Bing sequence shows that only 1 part of.

Here, it is important, as compared to the hopping synchronization period T s power hopping sequence is that much shorter. Thus, as will be observed frequency changes from one window provided on the time axis, within each hopping synchronization period T s, only the frequency of part of the n types of frequencies constituting the frequency hot Bing Sequence not be observed.

In the above example, and it has a T s <T d, but it may also be in the relationship of T s ≥ T d. Moreover, in one cycle time of the hopping sequence may set a plurality of sets of the above-mentioned hopping synchronization period T s and the data transmission and reception period T d. Conversely, T s occupies part of the period of hot Bing sequence, T d may occupy one or more periods spanning the next hop Pingushi one Ken scan.

To achieve frequency synchronization capturing bound by the hobbing synchronization period T s of the very limited time period described above, in the present invention, sea urchin by that shown in Figure 4, the receiving device, the frequency hopping rate of the transmitting-side apparatus to perform a high-speed mode of k times the speed of the frequency hot pin immediately. In this specification, each frequency the receiving device is applied to the frequency hopping of the high-speed mode to be executed is defined as "sense Frequency", the hopping sequence composed of a plurality of sense frequencies "Sense Frequency Sequence" to the child say.

One sense frequencies one cans consists sense the frequency of the discretely selected limited number from the hopping sequence of carrier frequencies. The number k of the sense frequency is urchin O to be described later, is determined by the relationship between the carrier frequency hopping sequence cycle relieved Bing synchronization period T s. Incidentally, each communication device, in response to the hopping pattern of the carrier frequency transmission receiver may use a plurality butter over emissions (hereinafter, referred to as "sense pattern") sense the frequency sequence is prepared.

In the example shown in FIG. 4, the sense sequence of frequencies is made from k different sense frequencies to the first hop f (l) or al k-th hop i (k), each hop period of the transmission side transfer frequency T sense sequence of frequencies one period of the velocity during the h, hopping of sense frequency is repeated. In the illustrated example, when the transmitting side is a frequency of the third hop F (3) of the hopping sequence the transport frequency, shows that consistent with the frequency of the seventh hop f sense frequency sequence (7). Figure 5 is a pro click view showing a main part of a transmission circuit of the transmitting-side communication device. In FIG, 1 1 is a modulation circuit for converting the transmission data 1 0 two signal sequences 1 2 and (I) to 1 2 (Q), the modulation circuit 1 first output signal 1 2 (1), 1 2 ( Q) is input to the multipliers 1 3 a and 1 3 B, Q signal component 1 9 perpendicular to thereto I signal component 1 9 of the carrier 1 9 generated in the frequency synthesizer 1 9 (I) (Q ) and it is orthogonally modulated by. The output of the multiplier, after being synthesized by the adder 1 4, band-pass filter 1 5, is transmitted as a radio signal via the antenna 1 7.

2 5, a frequency hopping (FH) pattern memory for Ki慷 frequency hot Bing sequence of a plurality of patterns to be described later, the hopping controller 2 0 in response to given El readout signal 2 1, one frequency hopping sequence information 2 2 indicating a frequency belonging to is read one after another. Hopping controller 2 0 periodically reads the frequency information from the upper Symbol FH pattern memory 2 5, and outputs it to the frequency synthesizer 1 9 as a frequency designation signal 2 3. Frequency synthesizer 1 9, in response to the frequency designation signal 2 3, switching the output frequency.

Figure 6 shows the main part of the receiver circuit of the receiving communication device.

Signal received by the antenna 3 0, after passing through the band pass filter 3 1, is input to two multipliers 3 2 A, 3 2 B. These multipliers 3 2 A, 3 2 B, straight communication No. components of the detection signal 5 1 of a specific frequency, each frequency synthesizer 5 0 occurs 5 1 (1), 5 1 (Q) is supplied, quadrature detection wave of'll go-between the received signal to this is done. The multiplier 3 2 A, 3 signal components orthogonal to each other are output from the 2 B is a low-pass filter (LPF) 3 3 A, 3 3 signal 3 4 removal of the by Ri harmonic component B (1), 3 becomes 4 (Q), a demodulation circuit 35, bit synchronization circuit 3 7, it is inputted Contact and the wire carrier re Athens circuit 4 0. Demodulation circuit 35 in synchronization with the bit Tokuro click 3 8-bit synchronizing circuit 3 7 occurs, the input signal 3 4 (1), 3 4 (Q) demodulates, and received data 3 6 to output Te.

5 5 is a hobbing controller for instructing the switching of the frequency to the frequency synthesizer 5 0 on the basis of the frequency information 5 7 read from the FH pattern memory 6 0, bit Bok clock 3 8-bit synchronizing circuit 3 7 occurs and bit synchronization with completion signal 3 9 receives the wire carrier Riasensu signal 4 9 Canon Li Athens circuit 4 0 is generated, controls the frequency hopping operation. The hopping control So攆 5 5 via the bus 5 9, is connected to a host processor (not shown). Incidentally, 5 6, the control signal out read hopping controller 5 5 gives to the hopping pattern memory 6 0, 5 8, hopping control So釁 5 5 illustrates a frequency designation signal supplied to the frequency synthesizer 5 0.

Figure 7 shows a configuration of a calibration Li Athens circuit 4 0.

LPF 3 3 A, 3 3 signal 髙調 wave component is removed by B 3 4 (I), 3 4 (Q) is input to a multiplier 4 1 A, 4 IB, the squared respective signal values after, it is added by the adder 4 2. Output 4 3 of the adder 4 2 is compared with a reference value (¾ value) 4 5 Comparison 4 4, is outputted as a calibration Li Athens signal 4 9. When a frequency of 5 1 of the detected signal output carrier frequency and the frequency synthesizer 5 0 to the reception signal input from the antenna is matched, the amplitude of the received signal (calibration Li A) size no longer, the adder outputs 4 3 of the value exceeds the reference value. If this good Unikiya Li § is detected, calibration Li Athens signal 4 9 is turned on, if not such a case, calibration Riasensu signal 4 9 are turned off.

Figure 8 shows an example of a hot-interleaving pattern table 61 stored in the FH pattern memory 6 0 of the receiving communication device. Also transmitting device stores the same hot Bing pattern table and this FH pattern memory 2 5.

The hopping pattern memory 61, a plurality of hot Bing frequency sequence identified by hopping pattern ID (HP 1 ~ HP) are stored. Each hopping frequency sequence, an n hop F (l) ~ F (n) by one cycle defines a hop sequence of n different frequencies (fl ~ fn). Sea urchin I can be seen from the illustrated example, hopping frequency sequence HP 1 ~ HPX is, frequency ί 1 ~ in a pattern that their respective different: defines the hop sequence of f η.

Figure 9 shows an example of the sense patterns Te one table 6 2 stored in F Eta pattern memory 6 0 together with the hot-interleaving pattern table 61.

The sense pattern table 6 2, a plurality of sense frequencies sheet one in the corresponding relationship between hopping frequency sequence Η Ρ 1 ~ Η Ρ X respectively cans SP l ~ SP x is Kizo, each sense frequency sequence SP l ~ SP x is the k hop f (l) ~ f (k) as one cycle defines a hop sequence of the sense frequency.

Sense frequencies that constitute the sense frequency sequence SP i is the hop sequence of the discretely selected, the sense frequency from the corresponding hot pin ring frequency sequence HP i is in accordance with the hop sequence in the hot Bing frequency sequence HP i . In the present invention, the transmission side instrumentation S is, while transmitting information on one carrier frequency in the hopping frequency sequence HP i, the reception side apparatus, the high the frequency of one cycle of the sense frequency sequence SP i It performs rate of hobbing operation to complete the synchronization acquisition in frequency hopping period of a predetermined number of times by the sending device.

Switching speed of the sense frequency performed on the receiving side within one hop period T h of the carrier frequency, i.e., the number k of sense frequencies forming the first sense sequence of frequencies SP i is included in one period of the hopping frequency sequence HP i the number n of 阇波 number of, Ri determined by the the hop count j of the hopping synchronization period T s, k is a value greater Ri by an integer value obtained by dividing the n in j.

Further, the sense frequencies forming the sensing frequency sequence SP i, for example, as shown in the first 0 Figure, in the n frequency hobbing frequency sequence HP i, k pieces located at n / k hop intervals to apply the frequency of.

For example n = 1 0 0 0, k = 1 0, from the nZ k = 1 0 0, select the frequency of the arbitrary position F (q) in hot pin ring frequency sequence f (l), which the as a starting point in 1 00 hop interval F (q + 1 0 0), F (q + 2 0 0), F (q + 3 0 0), the ...... sequentially f (2), f (3), f (4), choose to ....

In the case where n / k is not divisible, with an interval integral value not rounded down, selecting a k-number of frequencies. Thus, the sense frequency is not necessarily in the correct hop intervals hopping frequency in the sequence.

The good urchin, to form a sense frequency sequence SP 1 by discretely selected frequency from the hobbing frequency sequence HP i, once in every n Z k hops carrier on the transmission side, one of the sense We carrier wave coincides with the frequency current, always successful calibration re Athens within the prescribed period.

First FIG. 1 shows a synchronous control packetized Tsu Bok the sender instrumentation S transmits the hopping synchronization period T s.

7 0 F (1), 7 0 F (2), 7 0 F (3) of the hopping frequency sequence F (1), F (2), the synchronization control bucket bets transmitted on a carrier of a F (3) , and the respective synchronization control packet, for example 3 2 has a bit length, each bit synchronization and the order of the fixed pattern portions 7 1 a, that consisted relieved Pingumaka unit 7 1 B. The aforementioned hopping Ma one force 7 1 B, the packet information indicating whether entering data transmission and reception period T d many hops after the received have been inserted to the receiving side apparatus, the calibration re Athens after successful, based on the hot pin Gumaka information detected from the received packet, and controls the start of the transmission and reception operation of the data bucket and. The first 2 figures show Furochiya Ichito synchronization acquisition control to be executed by hot Bing controller 5 5.

Synchronization control instrumentation S 5 5, first, in order to frequency hopping in hot Pingushi Ichike Nsu the same pattern as the sender So镢 sets hopping pattern ID (scan Tetsupu 1 0 1). Hot Bing pattern ID may be, for example, by Unishi reading the value set from an external device to register the control apparatus 5 5 via the bus 5 9, it may be obtained from the host processor. And Erareru hopping pattern ID is given, and the hopping frequency sequence HP i should be used, this sense frequency sequence SP i that corresponds is uniquely determined.

To set the value of a parameter indicating the hop position S in the sense sequence of frequencies SP i to the initial value "0" (Step 1 0 2), and then the value of K 1 by ink re e n t and (1 0 3) determines whether the value of K exceeds the upper limit value k (1 0 4). If it K is less than k, reads the sense frequency of the K-hop f in the sense frequency sequence SP i from the memory 6 0 (K), and instructs the switching to the frequency synthesizer 5 0, the time the timer t the set Tosuru (1 0 5). Next, carry Athens check the output signal 4 9 of circuit 4 0, the K hop f (1 0 6) determines whether or not Canon Li Athens sense frequencies (K). If that can not be key catcher Li Athens, i.e., if the carrier frequency of the received signal of the cell Nsu frequency and mismatch, waiting for timer to timeout (1 0 7) Step 1 0 3 or later repeating the step.

Yotsute thereto, each time the time passes t, detection frequency in a sense frequency order which is defined in the sense frequency sequence SP i is successively hops. Here, hop interval t of the sense frequency, when the hop intervals of the carrier was T h, is in 閱係 of t ^ T h, this Yotsute, sea urchin described in FIG. 4, the T h High-speed mode of e Bbingu operation is performed for all the sense frequency of sense frequency sequence SP i in time. If the value of the parameter K has exceeded the upper limit value k, returns to stearyl-up 1 0 2, after the value of K initialized (K = 0), repeat step 1 0 3 subsequent operations.

If you can sense a wire carrier rear sense frequency of the kappa hop f (Κ) (1 0 6), from the middle to the hopping frequency sequence HP i of the memory 6 0, the sense frequency and same frequency hop position SF ( X) to search for a (1 0 8). Next, after the parameter N set to the above values ​​(1 0 9) for indicating a hop-position g in the frequency shea one cans HP i, the value of Roh parameter N and the ink re ment by one (1 1 0 ), it determines whether the value of n exceeds the upper limit value n (1 1 1). Also, if exceeds N is n, after setting the initial value (N = 0) (1 1 2), the flow returns to step 1 1 0.

If the value of the parameter N is less than the upper limit value n, reads the frequency of the first N hops F of hopping frequency sequence HP i (N), and instructs the switching to the frequency shea synthesizer 5 0, the carrier timer the value of the hop period T h to set Bok (1 1 3). Check the output signal 4 9 Calibration Li Athens circuit 4 0, the frequency of the first N hops F (N) determines whether or not calibration Li Athens (1 1 4), if, if it can not calibration Riasensu , until the timer times out (1 1 5), return 緣Ri the Canon Li Athens.

For example, sea urchin I shown in FIG. 4, in the middle of the frequency of JiMitsuru period T h hops F (3), the receiving side has successfully calibration Riasensu by the sense frequency f (7), immediately after its, Step 1 1 when switching the frequency of the receiving frequency of the next hop F (4) of F (3) 3, calibration re Athens is interrupted because the carrier of the transmission side is stuck in the frequency hop F (3) . Step 1 1 4 to 1 1 5 in the row 緣返's Ukya Li Athens, the sender is for waiting for the can-varying off frequency of the next hop F (4>.

Without first abnormal operation in calibration Li Athens (1 0 6), before the timer times with time T h, in harm successful calibration Riase license by the frequency of the N-hop F (N) there, but if, if the timer was not able to sense the calibration re-a before the time is up, go back to step 1 0 2, pressure, spear from a high-speed search.

Results sender is switched to the frequency of the first N hops F (N>, the calibration re A is sensed in Step 1 1 4, reconfigure the hop period T h of the carrier frequency to the timer (1 1 6), and then, and based on the bit clock output from bit synchronizing circuit 3 7 adjusts the timer operation (bit synchronization: 1 1 7). Yotsute thereto, hot Bingutai timing of the receiving device sender instrumentation S it is a call to synchronize the hop period T h and.

Next, to detect the hot Pingumaka from the output signal 3 6 demodulation circuit 35 (1 1 8), when the timer becomes timeout (1 1 9), from the values ​​of the Ma Ichiriki, receive path Kek DOO There determines whether the last synchronization control packet (1 2 0), if the last synchronization control bucket preparative process proceeds to step 1 2 8, otherwise the process proceeds to step 1 2 1.

Step 1 2 1 Step 1 2 7 is a control operation for hobbing the reception frequency in each period T h to the end of the synchronization control packet is received, the hop location parameters Ichita N of l ~ n while incrementing by 1 in the range (1 2 1-1 2 3), reads the frequency of the first N hops F of hopping frequency sequence HP i (N), and instructs the switching to the frequency synthesizer 5 0 , timer set the time T h in Tosuru (1 2 4). Each frequency hop Bing, detects the marker (1 2 5), when the timer has timed out (1 2 6), as long as the receiving buckets bets is not the last synchronization control packet, the process returns to Step 1 2 1, similar to repeat the procedure.

When receiving the synchronization control bucket preparative last hop synchronization period, performing frequency hobbing in the data transmission and reception period T d starting from step 1 2 8. First, after setting (1 2 8) to the initial value "1" the parameter Ichita C for Bok force hop number in the data transmission and reception period T d © emissions in the range of 1 to hop position g parameters Ichita N in with ink re ment one (1 2 9-1 3 1), reads the frequency of the first N hops F of hopping frequency sequence HP i (N), and instructs the switching to the frequency synthesizer 5 0 , the value of the hop period T h of the timer to set Bok (1 3 2). When T h time after the timer times out, the counter Toparame over data C and the ink re ment (1 3 4), the value of C is determined whether more than a predetermined value K (TO) (1 3 5) as long as it does not exceed the predetermined value K (tO), returns to step 1 2 9 repeats the hop behavior to the next frequency.

Incidentally, when receiving the last sync control packet in the synchronous control period T s, for example, in Step 1 2 8, it may be due Unishi notifying that you entered the data transmission and reception period T d to the upper processor.

In the above embodiment, the fixed length period that Kemah data transmission and reception period T d hopping number K (TO), the value of the length or the K (TO) of the data transmission and reception period T d is the sender device it may be due Unishi specifying the reception side apparatus in a certain data packet to be transmitted to the data transmission and reception period T d Iwame message.

In the embodiment, when the value of the counter Bok parameter C exceeds a predetermined value K (TO), and determined to have passed the data transmission and reception period T d, advances the control sequence to the next scan Tetsupu "NEXT" and which is, when the transmission side apparatus, for example, that during the transmission suspension period, while periodically returns 緣Ri frequency hopping at the same hopping frequency sequence HP i continue transmitting wire carrier re § no signal is above the f nEXT "scan Tetsupu the step 1 2 1, may be'll wait for the reception of the synchronization control bucket door of the next synchronization period T s Unishi.

Further, for example, sender instrumentation a is, the transmitted message in the data transmission and reception period T d, and notifies the receiving side hopping pattern ID to be used in the next communication, the new hopping frequency sequence HP i 'in the next when performing the data transmission and reception, the above-mentioned "NE XT" step and step 1 0 1, may be I Unishi to repeat the control operation that begins high-speed search or found at the receiving end. Even if you do not perform a cut conversion example of the hopping pattern, after the data transmission and reception, once, it may be Unishi by returning to the step 1 0 2. Further, for example, the transmission side apparatus base station starts communication with the mobile station as a receiver apparatus, when to perform a data transmission from the mobile station in response to receiving data from the base station, the mobile station upon reception operation as it continues to frequency hopping of the transmit data output frequency of the frequency synthesizer 5 0 as the carrier wave, it is necessary to perform synchronization acquisition in the receiving side instrumentation «and Do that base station. In this case, both the mobile station and a base station, a sense pattern table 6 2 shown in FIG. 9 is stored in the memory, from the mobile station side, synchronous control for a predetermined period prior to the data transmission (T s) packet send the door, by performing the data transmission thereafter Unishi, the base station side, 髙速 described in the first 2 Figure mode - performs synchronization acquisition by de sense frequency hopping, then for data reception of it is sufficient to jar the transition of the low-speed mode one-de-frequency hobbing. Interest for Allowed potential on the industrial

Uni I can understand from the above description, the present invention is previously formed a sense sequence of frequencies by the frequency of the discretely selected limited number of hopping frequencies sequence, to each carrier in the hop period T h of the received signal the sense frequency sheet - cans by hopping the detection frequency in the high-speed mode in one period of the switching speed, and calibration re Athens within hopping period of a predetermined number of carrier, achieving synchronization acquisition hobbing operation quickly are those was I can Unishi, according the present invention, in a wireless communication system that performs frequency hopping in a sequence of relatively short period becomes effective faster data transmission and reception operation.

Claims

The scope of the claims
1. The recipient Sodo, different relieved Bing frequency sequence that defines a hop sequence for the frequency, the sense sequence of frequencies which defines the hop sequence for frequencies limited number in the hop positions discrete from one another in the hobbing frequency sequence stores the door,
Transmitting device is periodically switched carrier frequency of the transmission signal according to the same frequency is one cans and hobbing frequency sequence of the reception side,
Recipient instrumentation is, according to the sense sequence of frequencies, at approximately one period of the switching speed of the sense sequence of frequencies within TsugiMitsuru period of each carrier frequency, the reception frequency and fast hopping, Canon Li in certain sense frequency upon successful Athens, as a starting point the hop location corresponding to the particular sense 阇波 number in the hot Bing frequency sequence, characterized in that it shifts to the low-speed hot Bing operation in accordance with the hot Bing frequency sequence synchronization acquisition method of frequency hobbing.
2. Upon successful calibration Riasensu in the specific sense frequencies, as a starting point the hop location corresponding to the particular frequency in said Ho Tsu Bing frequency sequence, switching the reception frequency to the frequency of the next hop location, predetermined when Canon Li § is detected in time, the synchronization capturing 捉方 method according to claim 1, characterized in that the transition to regular frequencies hopping operation according to the hopping frequency sequence.
3. Above with the sense sequence of frequencies, range first of claims, characterized that you apply a sequence of a plurality of frequencies spaced by the hopping frequency sequence in a predetermined hop interval or paragraph 2 synchronization acquisition method according.
4. As the sense sequence of frequencies, wherein, wherein applying the number of frequencies forming the hopping frequency sequence, a sequence of frequency number determined by the hop count of the carrier frequency allowed for synchronization acquisition synchronization acquisition method according to paragraph 1 or in the range of the second term.
5. The transmitting side apparatus transmits a bucket that contains the synchronization control information between a frequency hopping period of a predetermined number of times prior to data transmission,
The receiving device, the hobbing when going to the frequency hot pin ring operation according to the frequency sequence, claims, characterized in that by utilizing the synchronization control information in the received bucket preparative adjusting the hot Pingutai timing synchronization acquisition method according to what Re one of the first to fourth terms.
6. The transmitting side apparatus, between a predetermined number of frequency hopping period preceding the data transmission, transmits a bucket that contains the control information indicating the number of remaining hops up data transmission period,
The receiving instrumentation ¾ is, when a transition to the hot Bing frequency hot pin ring operation according to the frequency sequence, based on the control information in the received packet, and controls the start of data reception operation acquisition Scheme for any crab according to claims first to fourth terms.
7. Regularly in the frequency hobbing wireless communication system for transmitting and receiving hop Shinano grounds signals according to carrier frequencies predetermined hopping sequence,
A frequency synthesizer for switching the frequency of the output signal,
And detection circuitry for detecting a received signal at an output signal frequency from the frequency synthesizer,
A demodulation circuit for demodulating the received signal by processing the output signal of the detection circuit, in accordance with hobbing frequency sequence that defines a hop sequence for a plurality of different frequencies, the low-speed hot instructing switching of frequency in a predetermined period to the frequency synthesizer and Bing control means,
Accordance sense frequency sequence defines a hop sequence for frequencies limited number in the hop positions discrete in the above hot Bing frequency sequence, cut conversion example speed of approximately one cycle of the sense sequence of frequencies within the duration of each carrier frequency in a high-speed hot pin ring control means for instructing the switching of frequency in the frequency synthesizer,
While outputting the high-speed hot-interleaving means the frequency synthesizer is a specific frequency hopping mode one de by, when the wire carrier rear is detected from the detection circuit output, corresponding to the specific frequency in the hot Bing frequency sequence starting from the hop position location, a switching Ru hopping mode switching means hopping mode one de by the slow hobbing means
Frequency hopping radio communication system comprising the.
8. The hopping mode switching means, wherein starting from the hop positions 镢 corresponding to the specific frequency hopping frequencies in one Ken scan, said instructs the switching of the frequency synthesizer to the next frequency, the predetermined time period the wire carrier Li Athens when the circuit detects the calibration Li a, frequency hobbing wireless communication system according to claim 7, characterized in that switching to hot Pingumo one de by the slow hobbing unit within.
9. In the frequency hobbing wireless communication system for transmitting and receiving regularly hops while signals in accordance with a predetermined hopping sequence of carrier frequencies, hop receiving frequency in synchronization with the switching of the carrier frequency on the transmission side instrumentation S at a predetermined cycle hopping control instrumentation S for causing,
A frequency synthesizer for switching the frequency of the output signal in accordance with an instruction from the hobbing controller,
And detection circuitry for detecting a received signal at an output signal frequency from the frequency synthesizer,
A demodulation circuit for demodulating processing to received signals an output signal of said detection circuit, and determining Carrier detection circuit whether a Canon Li A based on the output signal of the detection circuit,
The hobbing control device,
And hopping frequencies one cans that defines the hop sequence for a plurality of different frequencies, a memory for serial 慷 a sense frequency sequence that defines a hop sequence for frequencies limited constant number in the hop positions discrete in the hot Bing frequency sequence and means,
Accordance with the above sense sequence of frequencies, at approximately one period of the switching speed of the sense sequence of frequencies within the duration of each carrier frequency, and 髙速 relieved Bing means for instructing switching of frequencies in said frequency synthesizer,
According to the above hobbing frequency sequence, and slow hobbing means for instructing switching of the frequency Jo Tokoro in the frequency synthesizer
It said 髙速 hobbing unit by hot Bing mode said frequency synthesizer THE is if the above carry Athens circuit while outputting a particular frequency is detected calibration Li A, the specific frequency and the corresponding hop-position in the hobbing frequency sequence starting from the location, frequency hot pin grayed wireless communication system according to Toku徵 that a switching Ru relieved Pingumo one de switching means hot Pingumo one de by the slow relief Bing means.
1 0. The hopping mode switching means, the hopping frequencies above a particular frequency and corresponding hop positions of the Ke in Nsu as a starting point, the instructed switching frequency Shin Sesaiza to the next frequency, the predetermined time period the wire carrier when Riasen scan circuit detects the wire carrier re §, frequency hot pin grayed wireless communication system according to claim 9, characterized in that switching to hot Pingumo over de by the slow hop Bing means within.
1 1. The detection circuit, based on an output signal from said frequency synthesizer, and quadrature detection the received signal,
The demodulation circuit, a frequency hopping radio communication system according to claim 9 in which quadrature detection signals processed to said demodulating the received signal outputted from the detection circuit.
1 2. Has a bit synchronization circuit for generating a bit click □ click based on the output of the detector circuit, the demodulation circuit demodulates the received signal based on the bit clock, the hopping control device, frequency hot Bing wireless communication system according to any one of claims 9 through Section first paragraph (1), characterized by adjusting the hot Pingutai Mi ring based on said bit Bok clock.
1 3. Frequency according to any one of the detection circuit claims paragraph 9 - first two terms, characterized in that it comprises a low pass filter for removing 髙調 wave component from the detection output signal hopping radio communication system.
PCT/JP1996/000679 1996-03-15 1996-03-15 Frequency hopping radiocommunication system and synchronous catching method WO1997035397A1 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007072746A (en) * 2005-09-07 2007-03-22 Fujitsu Ltd Information access system and active non-contact information storage device
JP2007533241A (en) * 2004-04-15 2007-11-15 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ Apparatus for use in a frequency hopping system
EP3197060A4 (en) * 2014-08-07 2017-08-09 Huawei Tech Co Ltd Data transmission method, device and system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6457845A (en) * 1987-08-27 1989-03-06 Gen Res Electronics Inc Code hopping type spread spectrum communication system
JPS6457846A (en) * 1987-08-27 1989-03-06 Gen Res Electronics Inc Pilot signal system in code hopping spread spectrum communication system
JPH0669906A (en) * 1992-08-24 1994-03-11 Nec Corp Pn code generator
JPH06261020A (en) * 1993-03-05 1994-09-16 Hitachi Ltd Frequency hopping communications system and communications equipment

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6457845A (en) * 1987-08-27 1989-03-06 Gen Res Electronics Inc Code hopping type spread spectrum communication system
JPS6457846A (en) * 1987-08-27 1989-03-06 Gen Res Electronics Inc Pilot signal system in code hopping spread spectrum communication system
JPH0669906A (en) * 1992-08-24 1994-03-11 Nec Corp Pn code generator
JPH06261020A (en) * 1993-03-05 1994-09-16 Hitachi Ltd Frequency hopping communications system and communications equipment

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007533241A (en) * 2004-04-15 2007-11-15 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ Apparatus for use in a frequency hopping system
JP2007072746A (en) * 2005-09-07 2007-03-22 Fujitsu Ltd Information access system and active non-contact information storage device
EP3197060A4 (en) * 2014-08-07 2017-08-09 Huawei Tech Co Ltd Data transmission method, device and system

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