SU1062886A1 - Phase-shift keying device - Google Patents

Description

№1

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1and

9 Yu EO EO 0)

figure 1

The invention relates to radio engineering and can be used in radio communication systems for radio navigation, radar and automatic control systems.

A device for generating a phase-shift keyed signal, comprising a manipulating sequence generator, is known. comparator unit, series-connected element I, a counter, a first frequency divider and a control trigger, as well as serially connected high-frequency generator, a pulse shaper, a pulse addition and subtraction unit, a second frequency divider and a band-pass filter whose output is the output of the entire device, the output of the pulse former is connected to the first inputs of the matching blocks, the second inputs of which are connected to the generator of the sequence of manipulations one directly, the other through the inverter, and three Lu block matcher inputs connected to respective outputs of the control latch, the sequence generator output manipulating t, is connected to the second input of the adding unit and subtracting pulses, a third input coupled to an output of the counter 1.

However, this device has low speed, the complexity of tuning the carrier frequency and relative phase.

The closest technical solution to the invention is a phase manipulator comprising a high frequency generator, a generator of a manipulating sequence and a first mixer connected in series, a first bandpass filter, a second mixer and a second bandpass filter 2.

However, the known phase manipulator has a low accuracy of the signal being mapped.

The purpose of the invention is to increase the accuracy of the signal being manipulated.

The goal is achieved by the fact that a phase controller has a high frequency generator, a manipulating sequence generator and the first mixer connected in series, the first band-pass filter, two controllable frequency dividers, a carrier tuning unit and a delay element whose input is connected to the output of the first controlled frequency divider, k; with the first input of the first mixer, to the second input of which the output of the second controlled frequency divider, the first input of which is connected to the high frequency generator generator and with the first input of the first controlled frequency divider, is connected to the second one

The potviy input of which is connected to the output of the generator of the manipulating sequence, while the output of the delay element is connected to the BTopbUvi input of the second mixer, and the output of the tuning unit of the carrier frequency is connected to the second input of the second controlled frequency divider.

FIG. 1 shows the block diagram of the proposed manipulator; FIG. voltage plots that show his work.

The phase manipulator contains a high-frequency generator 1, the first mixer 2, the first band-pass filter 3, the second mixer 4, the second band-pass filter 5, the first and second controlled dividers 6 and 7 frequencies, respectively, the generator 8 of the manipulating sequence, block 9 of the carrier frequency tuning, element 10. Delays.

Phase manipulator works as follows.

The signal from the output of the generator 1 high frequency

5, (1) and, so5 (soL-CHO

where Llf, 00, q), is the arg. width, frequency and phase of the signal is fed to the inputs of controlled frequency dividers 6 and 7. How is the output of the first controlled

6 frequency divider we have

Sjlfi O cos (u, t / n + C1,,, and) ,,

where Uij is the amplitude of the divided signal AND is the division factor. By changing the division factor n, it is possible to carry out frequency manipulation using the generator 8 of the manipulating sequence. Note that the law of rearrangement can be arbitrary. At the output of the second controlled frequency divider 7, we have

5, (- thU, co5 (cOit / ni-tq -2 In-i,

where (J-i, is the amplitude of the divided signal f (Jfl is the phase;

P - division ratio. After the first mixer 2 and the first band-pass filter 3, we have

S (tl U | COs (oo, f-ni-W, | M7H-i-4jHi-fn-iJ,

where U4 is the output signal amplitude

the first band-pass filter At the output of the second mixer: 4 after filtering by the second band-pass filter 5, we have

S5l.tl U4COs (,, - W, n4) t-t4i / nr4t / rii to U ,, il / hnqij i

 UjU4COS u) it | n., - 034l A.3 / n. + tft / M;

where tn, -7, is the delay time of the 10 delay element. The carrier frequency depends only on the division ratio of the second controlled frequency divider 7, which is changed by the signal from block 9, and the oscillation phase depends on the parameters of the delay element 10 and on the division factors of the first and second controlled dividers b and 7 frequencies. Since the carrier frequency of the phase-shifting oscillation is set once before its formation — and during the formation the constant is the same as the parameters of the delay element 10, the phase depends on the division ratio of the first frequency equalizer during the formation of the phase-controlled signal. The magnitude of the relative phase & tp is determined from the ratio l „f J ii -tsU4 --U, y, - gdeCO - signal band} n, - division factor, corresponding to Press; 1п ° - division factor, corresponding to Squeeze. The presence of frequency manipulation allows you to create a universal device for the formation of both the phases of the omnipulated and frequency-man-pooled signals with a wide range of rearrangement of the main parameters of the carrier frequency, frequency separation, relative phase), which allows the use of a phase manipulator equipment with strictly specified parameters, and scientific research. The first band-pass filter 3 is intended only to isolate the difference frequency and, when used as the first mixer of the D-triggers, it is no longer necessary. The absence of the first bandpass filter 3 allows the phase manipulator to be implemented using reliable elements of digital technology. At the time (of a phase change, pulses appear, the duration of which is equal to the group delay time in the delay element 10. When a phase changes with a positive derivative (Figs 2a-2d), the carrier is often - M that pulses is n MI .a when the phase changes from negative - / 1 1 derivative paBHaW.coJ-Ц4 ----- g-, These pulses are separated from the main by a frequency l CO, equal to the fact that the amplitude of the high frequency filling of pulses is the same, then the ratio of the energies is proportional to the ratio of the pulse durations 4Sr 180 ° data, I ,, 20 ms, then , - (lp "" 4 -; j5-V - ° c then G ", 5--10 s, and -A;: r-- QSIO,., lc 10. However, a significant part of the energy of the additional pulses will remain behind the band transmissions of the second mixer 4 and the second band-pass filter 5. And the more the frequency separation is selected, the shorter the duration of the additional pulses, and the less part of the energy of these pulses falls into the passband of the second band-pass filter 5). From here follow, that the additional impulses of the mohnb are neglected. Thus, the introduction of new elements, such as controlled frequency jitters and a delay element, and the establishment of new connections distinguishes the proposed phase manipulator from the known significant noBHnje accuracy of the manipulating signal ,.

Claims (1)

A PHASE MANIPULATOR comprising a high-frequency generator, a manipulating sequence generator, and a first mixer, a first band-pass filter, a second mixer, and a second band-pass filter, in series, in order to capture the accuracy of the manipulated signal, two controllable frequency dividers, a carrier frequency tuning unit and a delay element, the input of which is connected to the output of the first controllable frequency divider and to the first input of the first mixer, to whose second input I connect The output of the second controlled frequency divider is connected, the first input of which is connected to the output of the high frequency generator and the first input of the first controlled frequency divider, the output of the manipulating sequence generator is connected to the second input, while the output of the delay element is connected to the second input of the second mixer, and the output of the carrier frequency adjustment block is connected to the second input (of the Second controlled frequency divider. SU „„ 1062886 (rig. 1