KR100432422B1 - Radio Frequency Transceiver Module Control Method with Single Phase Synchronous Loop Structure - Google Patents

Abstract

The present invention is to provide a method for controlling to extend a steady state period of a radio frequency transceiver module operating in a single phase synchronous loop structure in a radio communication system for transmitting and receiving radio frequency in a time division duplex method. In the method according to the present invention, after switching to the reception mode, the latch enable signal of the R-word and the F-word is sequentially generated by the phase-locked loop provided in the radio frequency transceiver module, and then in the next transmission mode. The R-word data and the F-word data to be used are provided to the phase-locked loop described above, and the R-word and F-word latch enable signals are converted to the phase-locked loop at the time when the reception mode is terminated and the transition to the transmission mode is made. And R-word and F-word data to be used in the reception mode are generated with a phase locked loop. This process is repeated until the communication mode ends. Therefore, the period of operation in the steady state can be extended by the time required to receive phase synchronization loop data corresponding to the R-word from the microcomputer per cycle.

Description

Radio Frequency Transceiver Module Control Method with Single Phase Synchronous Loop Structure

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a radio frequency (hereinafter referred to as RF) transmit / receive module (TX / RX Module), in particular a radio having a phase locked loop (hereinafter referred to as PLL) structure. The present invention relates to a method for controlling a radio frequency transmission / reception module for controlling to extend a steady state period of a frequency transmission / reception module.

The RF transmission / reception module provided in the wireless communication system is configured to wirelessly transmit and receive a frequency lower than 300 GHz by being connected to an antenna and generally transmits and receives RF in a time division duplex (hereinafter, referred to as TDD) method. The TDD scheme allows transmission data and reception data to be transmitted at regular intervals. One transmission period and one reception period become one frame of TDD.

In this case, when the RF transmission / reception module operated by the TDD method has a single PLL structure, PLL operation data suitable for the reception mode is provided from the microcomputer so that the PLL provided in the reception period outputs an oscillation frequency suitable for the selected reception channel. In the transmission cycle, PLL operation data suitable for the transmission mode is provided from the microcomputer. Therefore, the PLL data is applied to the PLL in the RF transmission / reception module whenever it is converted from the transmission period to the reception period and whenever it is converted from the transmission period to the reception period.

Referring to Figures 1 and 2 will be described the operation of the conventional RF transceiver module having a single PLL structure as follows.

First, when the RF transmission / reception module is controlled in the reception mode (RX) by the microcomputer (not shown), the TX / RX SW in the RF transmission / reception module provides the (RX) reception path during the reception period as shown in FIG. do. As shown in FIG. 2, the microcomputer (not shown) controls the RF transmission / reception module (not shown) in the reception mode, and at the same time, the R-word PLL data and the clock signal suitable for the reception mode are provided in the RF transmission / reception module. To a PLL (not shown). The R-word consists of information (R, M) on the division ratio for the reference signal required for the aforementioned PLL (not shown) operation.

As illustrated in FIG. 1, the PLL includes a shift register 101, a latch control unit 102, a first latch 103, a reference signal divider 104, a second latch 105, and a feedback signal divider ( 106) and a phase comparator 107, and when the PLL data and the clock signal for the R-word are applied from the microcomputer (not shown), they are transferred to the shift register 101, as shown in FIG. At the same time, when a latch enable signal (Latch Enable, hereinafter abbreviated as LE) for the R-word is applied from the microcomputer (not shown), the latch is latched to the first latch 103 and then the reference signal divider 104 is applied. To load.

Then, if PLL data for the F-word (N, A information required for PLL operation) is applied, the data is transferred to the shift register 101. If the LE signal for the F-word is applied, the PLL data is stored in the shift register 101. The latched F-word is latched in the second latch 105 and then loaded into the feedback signal divider 106.

As described above, the PLL loaded with each R-word and F-word divides the applied reference signal by the division ratio determined according to the loaded R word and transmits it to the phase comparator 107, and the returned signal is loaded with F-. The result of comparing the phases is divided by the division ratio determined according to the word and transmitted to the phase comparator 107. The result is transmitted to a voltage controlled oscillator (not shown), which is output from the voltage controlled oscillator (not shown). The corresponding RF transceiver module has a settling time corresponding to several times as shown in FIG. 2 until the oscillation frequency becomes a steady state. Therefore, the RF transmission / reception module is switched to a reception mode as described in FIG. 2, operated in an abnormal state for several hundred microseconds, and then set to a normal state for data received through a TX / RX SW (not shown). Receive processing.

In the transmission mode, the PLL as shown in FIG. 2 is operated in the same manner. Therefore, after switching to the transmission mode as in the reception mode described above, the PLL is operated in an abnormal state for several hundreds of seconds, and then is set to a normal state. The transmitted data is transmitted through the RX SW (not shown).

As described above, the RF transmitting / receiving module having a single PLL structure has an abnormal state period corresponding to several hundreds of microseconds when it is switched to the reception period and the transmission period. Thus, a transmission PLL and a reception PLL are provided and operated. Compared with the RF transmission / reception module, there is a problem in that the time for transmitting and receiving data is substantially reduced.

The present invention has been made to solve the above-described problem, by controlling the timing of providing the phase synchronization loop data provided to the radio frequency transmission and reception module provided in the wireless communication system operated by a time division duplex (TDD) method to transmit and receive radio frequency The present invention provides a method for controlling a radio frequency transceiver module having a single phase synchronization loop structure that can extend a steady state period of a module.

In order to achieve the above objects, a method for controlling a radio frequency transceiver module according to the present invention is provided in a radio communication system having a radio frequency transceiver module operated in a single phase synchronous loop structure. Controlling an operation mode of the; Generating a first latch signal for information (R-word) related to the division ratio for the reference signal with the phase synchronization loop after controlling the operation mode; Generating a second latch signal for information (F-word) related to the division ratio for the feedback signal after the first predetermined time has elapsed after generating the first latch signal; After generating the second latch signal, transmitting information (R-word) related to the division ratio for the reference signal for the reception mode (or transmission mode) following the transmission mode (or reception mode) to the phase-locking loop; After the second predetermined time has elapsed, the information (F-word) related to the division ratio for the feedback signal for the reception mode (or transmission mode) mode following the transmission mode (or reception mode) is transmitted to the phase synchronization loop. step; Checking whether the communication mode has ended when one mode has ended; If the communication mode has ended, ending the task; If the communication mode has not been completed, the method may include returning to the step of generating the first latch signal after controlling the radio frequency transceiver module in a subsequent operation mode.

1 is a schematic functional block diagram of a phase locked loop provided in a conventional radio frequency transceiver module having a single phase locked loop structure;

2 is an operation timing diagram of a radio frequency transceiver module having a conventional single phase synchronization loop structure,

3 is a functional block diagram of a wireless communication system having a radio frequency transceiver module having a single phase synchronization loop structure,

4 is a flowchart illustrating a method for controlling a radio frequency transceiver module according to the present invention;

5 is an operation timing diagram of a radio frequency transceiver module according to the control method according to the present invention.

* Description of the symbols for the main parts of the drawings *

300: antenna 310: radio frequency transmission and reception module

317: phase locked loop (PLL) 318: voltage controlled oscillator (VCO)

320: microcomputer 330: key input unit

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3 is a schematic block diagram of a wireless communication system having a radio frequency transmission / reception module having a single phase locked loop (hereinafter, referred to as PLL) structure for performing a method according to the present invention. , A radio frequency (hereinafter referred to as RF) transmission / reception module 310, a microcomputer 320 for controlling all functions of the wireless communication system, and a key input unit 330.

The radio frequency transmission / reception module 310 is a band pass filter 311 connected to the antenna 300, a transmission / reception switch (TX / RX SW) 312, a low noise amplifier (hereinafter referred to as LNA) 313 , Mixer 314, intermediate frequency amplifier (hereinafter referred to as IF AMP) 315, frequency modulation (hereinafter referred to as FM) detector 316, PLL for providing oscillation frequency at transmission and reception ( 317, a voltage controlled oscillator (hereinafter referred to as VCO) 318, and a power amplifier (hereinafter referred to as PA) 319.

4 is an operation flowchart of a method for controlling an RF transceiver module having a single PLL structure according to the present invention, and FIG. 5 is an operation timing diagram of an RF transceiver module during operation as shown in FIG. 4.

Next, an operation according to the flowchart shown in FIG. 4 will be described in detail with reference to FIGS. 3 and 5.

First, when the wireless communication system is set to the communication mode, the microcomputer 320 checks whether the transmission / reception mode conversion is requested through the key input unit 330 to determine whether to perform the reception mode first or the transmission mode first, and then The operation is performed, which is basically a processing step, and thus the process for this is omitted.

Therefore, when the communication mode is set, the microcomputer 320 proceeds to step 401 to control the RF transmission / reception module 310 to the reception mode. Accordingly, the reference contact SO of the TX / RX SW 312 in the RF transmission / reception module 310 is switched with the contact S1 to provide a reception path during the reception period RX as shown in FIG. 5.

The microcomputer 320 that has controlled the reception mode proceeds to step 402 to generate a latch enable signal PLL LE corresponding to the R-word to the PLL 317 at the time shown in FIG. 5. Accordingly, the PLL 317 configured as shown in FIG. 1 loads the R-word information applied in the previous period into the reference signal divider 104. The R-word is information related to the division ratio for the applied reference signal, and is composed of R and M information. The R information is the division ratio of the programmable reference counter, and M is the division ratio of the module prescaler.

Next, the microcomputer 320 proceeds to step 403 to generate the latch enable signal PLL LE corresponding to the F-word and generates a latch enable signal corresponding to the R-word as shown in FIG. 5. Occurs when a predetermined time has elapsed. The F-word is information related to the division ratio for the signal to be returned, and consists of N and A information, where N is the division ratio of the programmable counter, and A is the division ratio of the Swallow Counter. The predetermined time described above is a time required for the F-word to be input from the microcomputer 320.

Accordingly, the PLL 317 loads information related to the division ratio for the F-word in the feedback signal divider 106, and the RF transmission / reception module 310 generates a settling time at a time as shown in FIG. Thereafter, the R-word has a steady state extended by the time it is loaded into the shift register 101.

In parallel with the above-described operation of the RF transmission / reception module 310, the microcomputer 320 generates a latch signal for the F-word, and then proceeds to step 404 to R for a next transmission mode as shown in FIG. 5. -Word data is sent to the PLL 317. Accordingly, the PLL 317 stores data for the applied R-word in the corresponding region of the shift register 101. In operation 405, the microcomputer 320 transmits data regarding the transmission F-word to the PLL 317, and the PLL 317 transmits the received F-word to the corresponding region of the shift register 101. Save it.

The microcomputer 320 proceeds to step 406 to check whether the reception mode is terminated. This check is performed based on a predetermined time, since the reception mode and the transmission mode are set regularly by the predetermined time. If the reception mode is terminated as a result of the check in step 406, the flow proceeds to step 407 and the microcomputer 320 checks whether the communication mode is terminated. Whether to exit the communication mode is made by analysis of the received data.

If the communication mode is not terminated as a result of the check in step 407, the microcomputer 320 proceeds to step 408. In operation 408, the microcomputer 320 controls the operation mode of the RF transmission / reception module 310 to the transmission mode. Accordingly, the reference contact SO of the TX / RX SW 312 is switched to the contact S2 to provide a transmission path during the transmission period TX as shown in FIG. 5.

When the R-word latch enable signal is generated in step 409, the R-word stored in the shift register 101 in the PLL 317 is stored in the first latch 103 as in step 402 described above. Is loaded into the reference signal divider 104. Next, when the microcomputer 320 generates the F-word latch enable signal to the PLL 317 in step 410, the PLL 317 loads the F-word as in step 403.

Next, the microcomputer 320 proceeds to step 411 to transmit the R-word data for reception to be used in the next reception period to the PLL 317, and proceeds to step 412, as described in step 405 described above. When the same time elapses, the reception F-word data is sent to the PLL 317. The processing of the PLL 317 for the R-word and F-word data transmitted in this way is performed in the same manner as in the reception mode described above.

The microcomputer 320 proceeds to step 413 to check whether the transmission mode is terminated. As a result of the check, if the transmission mode is terminated, the flow proceeds to step 414 and it is checked whether the communication mode is terminated. As a result of the check, if the communication mode is not terminated, the process returns to step 401 to repeat the above-described process. However, if it is determined in step 414 or step 407 that the communication mode is terminated, the microcomputer 320 ends the communication mode.

4 and 5 illustrate the case in which the reception mode is performed first and the transmission mode is performed. However, the same case as in the case of performing the transmission mode first and the reception mode next is also performed.

As described above, the present invention provides phase synchronization loop data provided to a radio frequency transmission / reception module included in a radio communication system for transmitting / receiving radio frequency in a time division duplex (TDD) scheme for a next transmission period during a reception period. Provides loop data and provides phase-locked loop data for the next receive cycle during the transmit period, so that the phase-locked loop is the phase-locked loop data at the time of period switching (from the transmit cycle to the receive cycle or from the receive cycle to the transmit cycle). By allowing the latch processing to be performed, it is possible to extend the period of operation in the steady state by the time required to receive phase synchronization loop data corresponding to the R-word from the microcomputer per cycle. This can be expected to have a greater effect when the communication time is long.

Claims (1)

In a wireless communication system having a radio frequency transceiver module operating in a single phase synchronization loop structure, Controlling an operation mode of the radio frequency transmission / reception module in one of transmission / reception modes; Generating a first latch signal for information (R-word) related to a division ratio for a reference signal with the phase synchronization loop after controlling the operation mode; Generating a second latch signal for information (F-word) related to the division ratio for a feedback signal after the first predetermined time has elapsed after generating the first latch signal; After generating the second latch signal, information (R-word) related to the division ratio for the reference signal for the reception mode (or transmission mode) subsequent to the transmission mode (or reception mode) is converted into the phase synchronization loop. Transmitting; After the second predetermined time has elapsed, information (F-word) related to the division ratio for the feedback signal for the reception mode (or transmission mode) following the transmission mode (or reception mode) is converted into the phase synchronization loop. Transmitting; Checking whether the communication mode has ended when the one mode has ended; If the communication mode has ended, ending the task; If the communication mode is not terminated, the control unit returns to the step of generating the first latch signal after controlling the radio frequency transmission / reception module to a reception mode (or transmission mode) subsequent to the transmission mode (or reception mode). A method for controlling a radio frequency transmission / reception module having a single phase synchronous loop structure, characterized in that it is performed.