JPH02294127A - Auxiliary signal multiplexing system - Google Patents
Auxiliary signal multiplexing systemInfo
- Publication number
- JPH02294127A JPH02294127A JP11573389A JP11573389A JPH02294127A JP H02294127 A JPH02294127 A JP H02294127A JP 11573389 A JP11573389 A JP 11573389A JP 11573389 A JP11573389 A JP 11573389A JP H02294127 A JPH02294127 A JP H02294127A
- Authority
- JP
- Japan
- Prior art keywords
- auxiliary signal
- signal
- circuit
- auxiliary
- absence
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
- 238000001514 detection method Methods 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims description 10
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims description 4
- 238000001228 spectrum Methods 0.000 abstract description 7
- 230000005540 biological transmission Effects 0.000 abstract description 6
- 230000006866 deterioration Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000009827 uniform distribution Methods 0.000 description 2
Landscapes
- Time-Division Multiplex Systems (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は補助信号多重化方式に関し、特に補助信号を主
信号に時分割多重化して伝送するディジタル無線通信回
線における補助信号多重化方式に関する．
〔従来の技術〕
主信号に対して伝送容量の小さい補助信号（制御線信号
，小容量回線信号など）を時分割多重化する従来の補助
信号多重化方式の一例を第２図に示す．送端インタフェ
ース回路１に入力された主信号１０は、ここでバイボー
ラ信号から信号処理のしやすいユニボーラ信号に変換さ
れて多重化回路２に入力される．補助信号１１は、多重
化回路２で送端インタフェース回路１の出力信号１２と
時分割多重化され、多重信号１７が変調器３に出力され
る．多重化回路２は、フレーム同期ビ・７ト等の付加ビ
ットと補助信号用の信号ビットとを速度変換を行って主
信号に挿入し、主信号ビット列に対してはスクランブル
処理を施したのち多重信号１７として送出している．
〔発明が解決しようとする課題〕
上述した従来の補助信号多重化方式では、補助信号２の
入力が無い場合、多重信号１７の補助信号用タイムスロ
ットの論理値が“１”又は“０”のいずれかに固定され
、自己相関の強い信号となる。このため変調器３の出力
の変調波１８の電力スベクトラム分布が一様でなくなり
、その度合は補助信号の伝送容量が大きい場合ほど大き
い。大容量のディジタル無線通信回線では、伝送路の振
幅特性の変動を補償し回線品質を維持するため、送信電
力スペクトラムが一様分布であることを想定した補償回
路が挿入されており、送信電カスペクトラムの分布が一
様でなくなると、受信側で復調する場合にビット誤り率
が劣化するという問題点がある。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an auxiliary signal multiplexing method, and particularly to an auxiliary signal multiplexing method in a digital wireless communication line in which an auxiliary signal is time-division multiplexed with a main signal and transmitted. [Prior Art] Figure 2 shows an example of a conventional auxiliary signal multiplexing method in which auxiliary signals with a small transmission capacity (control line signals, small capacity line signals, etc.) are time-division multiplexed with respect to the main signal. The main signal 10 input to the sending end interface circuit 1 is converted here from a bibolar signal to a uni-bolar signal that is easy to process, and is input to the multiplexing circuit 2. The auxiliary signal 11 is time-division multiplexed with the output signal 12 of the sending end interface circuit 1 in the multiplexing circuit 2, and a multiplexed signal 17 is outputted to the modulator 3. The multiplexing circuit 2 converts the speed of additional bits such as frame synchronization bits and 7 bits and signal bits for auxiliary signals and inserts them into the main signal, and performs scrambling processing on the main signal bit string before multiplexing. It is sent as signal 17. [Problems to be Solved by the Invention] In the conventional auxiliary signal multiplexing method described above, when the auxiliary signal 2 is not input, the logical value of the auxiliary signal time slot of the multiplexed signal 17 is “1” or “0”. It is fixed to one of the two, resulting in a signal with strong autocorrelation. Therefore, the power spectrum distribution of the modulated wave 18 output from the modulator 3 becomes non-uniform, and the degree of this becomes larger as the transmission capacity of the auxiliary signal becomes larger. In large-capacity digital wireless communication lines, in order to compensate for fluctuations in the amplitude characteristics of the transmission path and maintain line quality, a compensation circuit is inserted that assumes a uniform distribution of the transmission power spectrum. If the spectrum distribution becomes uneven, there is a problem that the bit error rate deteriorates when demodulating on the receiving side.
本発明の目的は、補助信号の伝送容量が大きい場合でも
補助信号の有無にかかわらずビット誤り率の低下しない
補助信号多重化方式を提供することである。An object of the present invention is to provide an auxiliary signal multiplexing method in which the bit error rate does not decrease regardless of the presence or absence of the auxiliary signal even when the transmission capacity of the auxiliary signal is large.
本発明の補助信号多重化方式は、多重化回路で補助信号
を主信号に時分割多重化して伝送するディジタル無線通
信回線の補助信号多重化方式において、前記補助信号の
有無を検出する補助信号検出回路と、擬似ランダム信号
を発生する擬似ランダム信号発生回路と、前記補助信号
検出回路の出力により前記擬似ランダム信号と前記補助
信号とを切り替えて前記多重化回路に接続する切替回路
とを備えて構成されている．
〔実施例〕
次に、本発明の実施例について図面を参照して説明する
。The auxiliary signal multiplexing method of the present invention is an auxiliary signal multiplexing method for a digital wireless communication line in which an auxiliary signal is time-division multiplexed with a main signal and transmitted in a multiplexing circuit, and the auxiliary signal detection method detects the presence or absence of the auxiliary signal. a pseudo-random signal generation circuit that generates a pseudo-random signal, and a switching circuit that switches between the pseudo-random signal and the auxiliary signal based on the output of the auxiliary signal detection circuit and connects it to the multiplexing circuit. It has been done. [Example] Next, an example of the present invention will be described with reference to the drawings.
第１図は本発明の一実施例を示すブロック図である。FIG. 1 is a block diagram showing one embodiment of the present invention.
第１図の実施例の回路は、第２図に示した従来例の回路
に加え、補助信号１１の有無を検出する補助信号検出回
路４と、擬似ランダム信号１６を発生する擬似ランダム
信号発生回路５と、補助信号検出回路４の出力のＩ’Ｊ
御信号１５により擬似ランダム信号１６と補助信号１１
とを切替えて多重化回路２に供給する切替回路６とを備
えて構成されている．
上記の構成において、補助信号１１の入力が然い場合に
は、切替回路６は擬似ランダム信号発生回路５の出力を
多重化回路２に供給しており、補助信号１１が入力され
ると、補助信号検出回路４がこれを検出して切替回路６
を切り替え、補助信号１１を多重化回路２に接続する．
従って、多重化回路２からの多重信号１３の補助信号用
タイムスロットは、補助信号１１が無い場合でも一定の
論理値に固定されることがなくなり、変調波１４の電力
スベクトラムは常に一様分布となるので、受信側でビッ
ト誤り率が低下することはない。In addition to the circuit of the conventional example shown in FIG. 2, the circuit of the embodiment shown in FIG. 5 and I'J of the output of the auxiliary signal detection circuit 4.
The pseudo random signal 16 and the auxiliary signal 11 are generated by the control signal 15.
and a switching circuit 6 that switches between and supplies the multiplexing circuit 2 to the multiplexing circuit 2. In the above configuration, when the input of the auxiliary signal 11 is correct, the switching circuit 6 supplies the output of the pseudorandom signal generation circuit 5 to the multiplexing circuit 2, and when the auxiliary signal 11 is input, The signal detection circuit 4 detects this and switches the switching circuit 6.
, and connect the auxiliary signal 11 to the multiplexing circuit 2.
Therefore, the auxiliary signal time slot of the multiplexed signal 13 from the multiplexing circuit 2 is no longer fixed to a constant logical value even in the absence of the auxiliary signal 11, and the power spectrum of the modulated wave 14 always has a uniform distribution. Therefore, the bit error rate does not decrease on the receiving side.
以上詳細に説明したように、本発明によれば、補助信号
の有無にかかわらず常に変調波の電力スベクトラムを一
様分布とすることができるので、補助信号の伝送容量が
大きくなっても、補助信号入力の無いときに主信号のビ
ット誤り率が劣化せず、回線品質を維持できる効果があ
る。As explained in detail above, according to the present invention, the power spectrum of the modulated wave can always be uniformly distributed regardless of the presence or absence of the auxiliary signal. This has the effect that the bit error rate of the main signal does not deteriorate when there is no signal input, and line quality can be maintained.
図は従来の補助信号多重化方式の一例のプロ・７ク図で
ある。The figure is a schematic diagram of an example of a conventional auxiliary signal multiplexing system.
１・・・・・一送端インタフェース回路、２・・−・・
・多重化回路、３−・・・・・変調器、４−・・・・・
切替回路、５・・・・−・擬似ランダム信号発生回路、
１０・・・・・一生信号、１１・・−・・・補助信号、
１２・・・・・・出力信号、１Ｂ，１．７・−・・・・
多重信号、１４．１８・・・・・一変調波、１５・・・
・・・制御信号、１６・・・・−・擬似ランダム信号。1...1 sending end interface circuit, 2...-...
・Multiplex circuit, 3-...Modulator, 4-...
switching circuit, 5...Pseudo-random signal generation circuit,
10...Issei signal, 11...Auxiliary signal,
12... Output signal, 1B, 1.7...
Multiplexed signal, 14.18...One modulated wave, 15...
...control signal, 16...--pseudo random signal.
代理人 弁理士 内 原 ＶｌAgent: Patent Attorney Uchihara Vl
Claims (1)
するディジタル無線通信回線の補助信号多重化方式にお
いて、前記補助信号の有無を検出する補助信号検出回路
と、擬似ランダム信号を発生する擬似ランダム信号発生
回路と、前記補助信号検出回路の出力により前記擬似ラ
ンダム信号と前記補助信号とを切り替えて前記多重化回
路に接続する切替回路とを備えたことを特徴とする補助
信号多重化方式。In an auxiliary signal multiplexing method for a digital wireless communication line in which an auxiliary signal is time-division multiplexed with a main signal in a multiplexing circuit and transmitted, the auxiliary signal detection circuit detects the presence or absence of the auxiliary signal, and the pseudo-random signal is generated. An auxiliary signal multiplexing method comprising: a random signal generation circuit; and a switching circuit that switches between the pseudo-random signal and the auxiliary signal based on the output of the auxiliary signal detection circuit and connects the switching circuit to the multiplexing circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11573389A JPH02294127A (en) | 1989-05-08 | 1989-05-08 | Auxiliary signal multiplexing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11573389A JPH02294127A (en) | 1989-05-08 | 1989-05-08 | Auxiliary signal multiplexing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02294127A true JPH02294127A (en) | 1990-12-05 |
Family
ID=14669745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11573389A Pending JPH02294127A (en) | 1989-05-08 | 1989-05-08 | Auxiliary signal multiplexing system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02294127A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60180236A (en) * | 1984-02-27 | 1985-09-14 | Nec Corp | Synchronous multiplex system |
| JPS60206347A (en) * | 1984-03-30 | 1985-10-17 | Fujitsu Ltd | Circuit monitor and control equipment |
| JPS6231229A (en) * | 1985-08-01 | 1987-02-10 | Nec Corp | Repeater |
-
1989
- 1989-05-08 JP JP11573389A patent/JPH02294127A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60180236A (en) * | 1984-02-27 | 1985-09-14 | Nec Corp | Synchronous multiplex system |
| JPS60206347A (en) * | 1984-03-30 | 1985-10-17 | Fujitsu Ltd | Circuit monitor and control equipment |
| JPS6231229A (en) * | 1985-08-01 | 1987-02-10 | Nec Corp | Repeater |
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