CN1268077C - Optical CDMA wavelength-time domain two-dimensional optical orthogonal code coder and decoder - Google Patents
Optical CDMA wavelength-time domain two-dimensional optical orthogonal code coder and decoder Download PDFInfo
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- CN1268077C CN1268077C CNB2004100090610A CN200410009061A CN1268077C CN 1268077 C CN1268077 C CN 1268077C CN B2004100090610 A CNB2004100090610 A CN B2004100090610A CN 200410009061 A CN200410009061 A CN 200410009061A CN 1268077 C CN1268077 C CN 1268077C
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Abstract
The present invention discloses a new structure for a wave length-time domain adjustable two-dimensional optical orthogonal code encoder / decoder, which is suitable for an optical code division multiple access communication network. The present invention belongs to the technical fields of information networks and optical communication. The present invention has the following technical schemes: the optical code division multiple access wave length-time domain two-dimensional optical orthogonal code encoder / decoder selects wave length-time domain two-dimensional optical orthogonal code to carry out encoding/decoding, and is composed of optical encoding/decoding module, a control circuit and a signaling proxy; the optical encoding/decoding module is controlled by the control circuit; the control circuit receives the instructions which are emitted by the signaling proxy to realize the wavelength selection and the delay time selection; the signaling proxy is connected with a signaling network; the optical encoding/decoding module is composed of a 1*N wavelength division multiplexer, an N*w optical switch, w adjustable optical fiber delay lines, a w*N optical switch and an N*1 wavelength division multiplexer. The adjustable two-dimensional optical orthogonal code encoder / decoder of the present invention can realize the encoding/decoding of optional two-dimensional wave length-time domain optical orthogonal codes, and has the advantages of modular structure and convenient integration.
Description
Technical field:
The present invention relates to the structure of the encoder in the optical code division multiple access communications network system, belong to information network technique field and technical field of optical fiber communication.
Background technology:
Sharp increase, the particularly uncertainty of IP operation amount and Unpredictability along with the kind and the traffic carrying capacity of Network have proposed more and more higher requirement to communication network.In recent years, backbone network adopted dilatation of DWDM technology and the research and development of exchange optical transfer network automatically, obtained tremendous development at aspects such as two-forty, big capacity, long distances, and strided forward towards the direction of intelligent and high-efficiency.And metropolitan area network, particularly Access Network become the bottleneck of communication network, have limited the development of communication network.Therefore, it has been inexorable trend that optical-fiber network advances to the edge of whole communication network, and metropolitan area network and Access Network will become the emphasis of Future Development.
In the numerous access network technologies that proposed, optical code division multiple access technique is owing to have full optical processing, can realize the high-speed transfer of data, the user is asynchronous to be inserted at random, can realize flexible networking, network energy dynamic bandwidth allocation, to business, agreement and topology are transparent, support variable bit rate and burst service, and can realize prioritized QoS by user's request, be convenient to the upgrading and the extensibility of network, good confidentiality, safe, the realization cost is low, the control of network and manage outstanding advantages such as simple and convenient, and become a kind of most promising technology that realizes optical access network.
Adopting the optical code division multiple access technique networking is the design and the realization of the light coder/decoder of function admirable with the key of communicating by letter.Can be divided into time-domain coding/decoding, frequency domain coding/decoding, wavelength-time-domain coding/decoding and phase place coding/decoding about the light coding/decoding.What the time-domain coding/decoding adopted is the unipolar code of light, correlation between the code word is undesirable, make between code word capacity (reflection number of users) and the spread spectrum length (reflection data rate) contradiction each other, therefore, number of users and the user's data speed that take into account simultaneously in the net are very difficult.What the light phase coding/decoding adopted is the coherent light code division multiple access technology, and the technical difficulty of realization is big, cost is high, realizes very difficult in a short time.And wavelength-time-domain two dimension light coding/decoding, under identical spread spectrum length, can increase number of users greatly, and along with the maturation of wavelength-division multiplex technique, from the realization difficulty of technology with realize on the cost, wavelength-time-domain two dimension light coding/decoding is to realize the optical code division multiple access most promising technology of communicating by letter.About wavelength-time-domain two dimension light coder/decoder, just fixed light coder/decoder and the very limited coder/decoder of adjustable extent that propose on the document at present, adopt the fixed light coder/decoder, can only realize the communication of point-to-point, can't realize a little to multiple spot or broadcast operation, and multiple spot can't be realized networking to the communication of multiple spot.About the tunable optical coder/decoder, rarely seen report that has the employing grating to realize the tunable optical coder/decoder, it can only realize that one dimension is adjustable, adjustable extent is narrow, and grating is subject to the influence of environmental change factors such as temperature, and the less stable of its performance, application limit are very big.
Summary of the invention:
The purpose of this invention is to provide a kind of have modular construction, function strong, realize simple, cost is low, the wavelength-time-domain adjustable two-dimensional optical orthogonal encoder that can realize the optical code division multiple access communication network.
Technical scheme of the present invention is as follows:
Optical code division multiple access wavelength-time-domain two-dimensional optical orthogonal code encoder, described encoder is selected wavelength-time-domain two dimension (N * M, w, λ
a, λ
c) light orthogonal code carries out light coding, its code word district group is [(i
1, j
1), (i
2, j
2) ..., (i
k, j
k) ..., (i
w, j
w)], wherein: N is the wavelength sum that comprises of sign indicating number, and M cuts general number the time, and w is the code weight of each code word, i.e. 1 the number that comprises of each code word, λ
aBe the auto-correlation restriction of sign indicating number, λ
cCross-correlation restriction for sign indicating number; Described encoder is made up of light coding module, control circuit and Xin Lingdaili; The light coding module is controlled by control circuit, and control circuit is accepted instruction realization wavelength selection and the delay selection that Xin Lingdaili sends; Xin Lingdaili links to each other with signaling network; Described smooth coding module is by forming with lower member:
1 * N Wave decomposing multiplexer: being used for to be the narrow light pulse of cutting general width τ through the time width from wideband light source after the data-modulated, and being divided into wavelength is λ
0, λ
1, λ
N-1The light pulse (each light pulse corresponding a wavelength) of N wavelength;
N * w optical switch: accept the control of control circuit, selecting wavelength according to described wavelength-time-domain two-dimensional optical orthogonal code is λ
Ik(0≤i
k≤ N-1, k=1,2 ..., the light pulse of w w):
W bar adjustable optic fibre delay line: accept the control of control circuit, according to second coordinate figure j of described wavelength-time-domain two-dimensional optical orthogonal code code word element
k(0≤j
k≤ M-1), described N * selected w of w optical switch light pulse realized different time-delay j
kτ;
W * N optical switch: be used for and realized time-delay j
kτ (k=1,2 ..., N * 1 wavelength division multiplexer is delivered in the light pulse of w w);
N * 1 wavelength division multiplexer: be used for w the light pulse that described w * the N optical switch sends realized closing ripple.
Adjustable two-dimensional optical orthogonal encoder of the present invention, cataloged procedure as shown in Figure 1, at first, narrow light pulse (time width of light pulse is for cutting general width τ) from wideband light source, after data-modulated, deliver to 1 * N Wave decomposing multiplexer 2 by optical fiber 1, being divided into wavelength is λ
0, λ
1, λ
N-1N wavelength light pulse (3,4,5 ..., 6), the corresponding wavelength (λ of each light pulse
0, λ
1, λ
N-1); Then, according to first coordinate i of each code element in wavelength-time-domain two-dimensional optical orthogonal code code word
k(0≤i
k≤ N-1), (k=1,2 ..., w), selecting wavelength by N * w optical switch 7 is λ
IkW light pulse, their through w bar adjustable optic fibre delay line (12,13,14 ..., 15) and realize time-delay, its medium wavelength is λ
IkThe time-delay of light pulse be j
kτ (0≤j
k≤ M-1); Through w * N optical switch 16, N * 1 wavelength division multiplexer 17 is delivered in w the light pulse that has realized suitable time-delay realized closing ripple again.Promptly realized the coding of wavelength-time-domain two-dimensional optical orthogonal code.Because cooperatively interacting, two N * w optical switches (7 and 16) can realize the wavelength selection, w bar adjustable optic fibre delay line (12,13,14,15) can realize different time-delays,, thereby realize the coding of any wavelength-time-domain two-dimensional optical orthogonal code so optical encoder can be realized wavelength-time-domain two-dimensional adjustable.
Adjustable two-dimensional optical orthogonal decoder of the present invention, its structure and optical encoder are identical, realize any wavelength-time-domain two dimension photodissociation sign indicating number.Specifically describe as follows:
Optical code division multiple access wavelength-time-domain two-dimensional optical orthogonal code decoder, described decoder is selected wavelength-time-domain two dimension (N * M, w, λ
a, λ
c) light orthogonal code carries out the photodissociation sign indicating number, its code word district group is [(i
1, j
1), (i
2, j
2) ..., (i
l, j
l) ..., (i
w, j
w)], wherein: the wavelength sum that N comprises for sign indicating number, M cuts general number the time, and w is the code weight of each code word, λ
aBe the auto-correlation restriction of sign indicating number, λ
cCross-correlation restriction for sign indicating number; Described decoder is made up of photodissociation sign indicating number module, control circuit and Xin Lingdaili; Photodissociation sign indicating number module is controlled by control circuit, and control circuit is accepted the instruction that Xin Lingdaili sends, and realizes wavelength selection and delay selection; Xin Lingdaili links to each other with signaling network; Described photodissociation sign indicating number module is by forming with lower member:
1 * N Wave decomposing multiplexer: it is λ that the light code signal that is used for receiving from the optical code division multiple access optical-fiber network is divided into wavelength
0, λ
1..., λ
N-1Light pulse;
N * w optical switch: accept the control of control circuit, selecting wavelength according to described wavelength-time-domain two-dimensional optical orthogonal code is λ
Il(0≤i
l≤ N-1, l=1,2 ..., light pulse w);
W bar adjustable optic fibre delay line: accept the control of control circuit, according to second coordinate figure j of described two-dimensional optical orthogonal code code word element
l(0≤j
l≤ M-1), the selected light pulse of described N * w optical switch is realized different time-delay (M-j
l) τ, (l=1,2 ..., w);
W * N optical switch is used for and will have realized time-delay (M-j
l) τ (l=1,2 ..., N * 1 wavelength division multiplexer is delivered in light pulse w);
N * 1 wavelength division multiplexer is used for the light pulse that described w * the N optical switch sends is realized closing ripple.
Equally, decoder of the present invention as shown in Figure 1, from the light code signal that the optical code division multiple access network receives, being divided into wavelength through 1 * N Wave decomposing multiplexer 2 is λ
0, λ
1..., λ
N-1Light pulse; It is λ that N * w optical switch 7 is selected wavelength
Il(0≤i
l≤ N-1, l=1,2 ..., light pulse w), wavelength is λ
IlLight pulse through the adjustable optic fibre delay line (12,13,14 ..., 15) and realization (M-j
l) time-delay of τ; W * N optical switch 16 will realize that the light pulse of suitable time-delay delivers to N * 1 wavelength division multiplexer 17, and N * 1 wavelength division multiplexer 17 realizes closing ripple with the light pulse that w * N optical switch 16 sends.So just realized decoding to input light code signal, promptly relevant.When photodissociation sign indicating number and light coding is complementary, promptly realized auto-correlation, can recover data by the auto-correlation peak value; When photodissociation sign indicating number and light coding does not match, realize cross-correlation, being equivalent to does not have transfer of data.
Above-mentioned optical encoder or light decoder, described control circuit comprises wavelength selection control device 20 and delay selection controller 21, wavelength selection control device 20 is used to control described N * w optical switch 7 and 16 to realize the wavelength selection, delay selection controller 21 is used to control described w bar adjustable optic fibre delay line (12,13,14 ..., 15) and to realize delay selection.
Above-mentioned optical encoder or light decoder, described adjustable optic fibre delay line structure is all identical, as shown in Figure 2, every adjustable optic fibre delay line comprises one 1 * 2 optical switch 24, m-2 2 * 2 optical switches 25,2 * 1 optical switches 24, and a described m optical switch passes through optical fiber (26,27 successively, 28,29,30 ... 31) polyphone, time-delay is followed successively by τ, 2 τ, 2
2τ, 2
3τ ..., 2
M-2τ, m are the positive integer greater than 2.State by control circuit control 1 * 2 and 2 * 2 optical switches is realized required time-delay.
Advantage of the present invention and good effect are as follows:
Adopt wavelength of the present invention-time-domain two-dimensional optical orthogonal code coder/decoder to carry out light coding and photodissociation sign indicating number, the networking that can realize the optical code division multiple access network with communicate by letter.It except advantage with traditional optical code division multiple access network, also have network user's number numbers of users many, that can realize simultaneously communication many, to the advantage such as less demanding of technology and optical device.Adjustable two-dimensional optical orthogonal coder/decoder of the present invention can be realized the coding/decoding of random two-dimensional wavelength-time-domain light orthogonal code, and adjustable extent is big, and stable performance has modular construction, realizes simply, and cost is low, is convenient to integrated.Adjustable two-dimensional optical orthogonal coder/decoder of the present invention is with a wide range of applications, can be used for the networking of backbone network and metropolitan area network, particularly optical access network, also can combine, realize flexible networking with the WDM optical-fiber network, effectively utilize Internet resources more, more, better service is provided.
Description of drawings:
Fig. 1 is the structural representation of optical code division multiple access adjustable two dimension light coder/decoder.
Fig. 2 is the structural representation of adjustable optic fibre delay line.
Fig. 3 is the structural representation of optical code division multiple access adjustable two dimension optical encoder one specific embodiment of the present invention.
Among the figure:
1-optical fiber (transmission is by the narrow light pulse signal in the broadband of data-modulated)
2-1 * N demodulation multiplexer
The 3-output wavelength is λ
0Narrow light pulse
The 4-output wavelength is λ
1Narrow light pulse
The 5-output wavelength is λ
2Narrow light pulse
The 6-output wavelength is λ
N-1Narrow light pulse
7-N * w optical switch
The 8-output wavelength is λ
I1Narrow light pulse
The 9-output wavelength is λ
I2Narrow light pulse
The 10-output wavelength is λ
I3Narrow light pulse
The 11-output wavelength is λ
IwNarrow light pulse
12,13,14,15-adjustable optic fibre delay line
16-w * N optical switch
17-N * 1 multiplexer
The transmission line of 18-signaling network
The 19-Xin Lingdaili
20-wavelength selection control device
21-delay selection controller
The electric control signal transmission line that 22-control wavelength is selected
The electric control signal transmission line of 23-control Variable delay
24-1 * 2 optical switches
25-2 * 2 optical switches
The 26-time-delay is the fiber delay line of τ
The 27-time-delay is the fiber delay line of 2 τ
The 28-time-delay is 2
2The fiber delay line of τ
The 29-time-delay is 2
3The fiber delay line of τ
The 30-time-delay is 2
4The fiber delay line of τ
The 31-time-delay is 2
M-2The fiber delay line of τ
Embodiment:
As shown in Figure 3, be an exemplary construction schematic diagram of optical code division multiple access adjustable two dimension optical encoder structure of the present invention, this encoder can be realized the coding/decoding of (5 * 28,4,0, a 1) light orthogonal code.The number of wavelengths N=5 of this yard, the time is cut general several M=28, code weight w=4, auto-correlation restriction λ
a=0, cross-correlation restriction λ
c=1.The code word district group of this yard is:
[(i
1，j
1)，(i
2，j
2)，(i
3，j
3)，(i
4，j
4)]＝{[(l，(l⊙
7i
2)4)，(l1，1+((l1)⊙
7i
2)4)，
(l4，2+((l4)⊙
7i
2)4)，(l3，3+((l3)⊙
7i
2)4)]：l∈[0，4]，i
2∈[0，6]}
Wherein, represents that mould 5 adds ⊙
7Expression mould 7 is taken advantage of.
Described encoder is made up of light coding module, control circuit (comprising wavelength selection control device 20 and delay selection controller 21) and Xin Lingdaili 19; The light coding module is controlled by control circuit, and control circuit is accepted instruction realization wavelength selection and the delay selection that Xin Lingdaili 19 sends; Xin Lingdaili 19 links to each other with signaling network by the transmission line 18 of signaling network; Described smooth coding module is by forming with lower member:
1 * 5 Wave decomposing multiplexer 2: being used for to be to cut the narrow light pulse that general width is τ through the time width from wideband light source after the data-modulated, and being divided into wavelength is λ
0, λ
1, λ
2, λ
3, λ
4The light pulse (each light pulse corresponding a wavelength) of 5 wavelength;
5 * 4 optical switches 7: accept the control of wavelength selection control device 20, selecting wavelength according to described wavelength-time-domain two-dimensional optical orthogonal code is λ
0, λ
1, λ
2, λ
44 light pulses;
4 * 5 optical switches 16: be used for and realized time-delay j
k5 * 1 wavelength division multiplexers are delivered in 4 light pulses of τ (k=1,2,3,4);
5 * 1 wavelength division multiplexers 17: 4 light pulses that are used for described 4 * 5 optical switches are sent realize closing ripple.
Described adjustable optic fibre delay line comprises 11 * 2 optical switch, 42 * 2 optical switches, 12 * 1 optical switch; By the fiber delay line serial connection, time-delay is followed successively by τ, 2 τ, 2 to described 6 optical switches successively
2τ, 2
3τ, 2
4τ.
Described (5 * 28,4,0,1) light orthogonal code has 35 code words, and each code word is by λ
0～λ
4Any 4 wavelength in five wavelength are formed, and the reference time delay of cutting general pulse of each wavelength correspondence is between 0～27 τ.For example: when utilizing one of them code word [(0,22), (1,4), (2,9), (4,19)] to carry out the light coding, at first tell λ by 1 * 5 Wave decomposing multiplexer
0～λ
4It is λ that wavelength is therefrom selected in the light pulse of five wavelength, 5 * 4 optical switches
0, λ
1, λ
2, λ
4Four light pulses, making wavelength by the adjustable optic fibre delay line is λ
0, λ
1, λ
2, λ
4Cut general pulse delay time respectively 22 τ, 4 τ, 9 τ and 19 τ cut general pulse by 4 * 5 optical switches with these again and deliver to 5 * 1 wavelength division multiplexers and realize closing ripple, have promptly realized the light coding.
The difference of scalable decoder and encoder, just corresponding wavelength is λ
0, λ
1, λ
2, λ
4The time-delay of cutting general pulse be respectively (28-22) τ=6 τ, (28-4) τ=24 τ, (28-9) τ=19 τ and (28-19) τ=9 τ, other and encoder are identical.
Claims (6)
1. optical code division multiple access wavelength-time-domain two-dimensional optical orthogonal code encoder is characterized in that, described encoder is selected wavelength-time-domain two dimension (N * M, w, λ
a, λ
c) light orthogonal code carries out light coding, its code word district group is [(i
1, j
1), (i
2, j
2) ..., (i
k, j
k) ..., (i
w, j
w)], wherein: the wavelength sum that N comprises for sign indicating number, M cuts general number the time, and w is the code weight of each code word, λ
aBe the auto-correlation restriction of sign indicating number, λ
cCross-correlation restriction for sign indicating number; Described encoder is made up of light coding module, control circuit and Xin Lingdaili; The light coding module is controlled by control circuit, and control circuit is accepted instruction realization wavelength selection and the delay selection that Xin Lingdaili sends; Xin Lingdaili links to each other with signaling network; Described smooth coding module is by forming with lower member:
1 * N Wave decomposing multiplexer: being used for to be the narrow light pulse of cutting general width τ through the time width from wideband light source after the data-modulated, and being divided into wavelength is λ
0, λ
1, λ
N-1The light pulse of N wavelength, the corresponding wavelength of each light pulse;
N * w optical switch: accept the control of control circuit, selecting wavelength according to described wavelength-time-domain two-dimensional optical orthogonal code is λ i
kW light pulse, 0≤i
k≤ N-1, k=1,2 ..., w;
W bar adjustable optic fibre delay line: accept the control of control circuit, according to second coordinate figure j of two-dimensional optical orthogonal code code word element
k, described N * selected w of w optical switch light pulse realized different time-delay j
kτ, 0≤j
k≤ M-1;
W * N optical switch: be used for and realized time-delay j
kN * 1 wavelength division multiplexer is delivered in the w of a τ light pulse;
N * 1 wavelength division multiplexer: be used for w the light pulse that described w * the N optical switch sends realized closing ripple.
2. optical code division multiple access wavelength as claimed in claim 1-time-domain two-dimensional optical orthogonal code encoder, it is characterized in that, described control circuit comprises wavelength selection control device and delay selection controller, and described wavelength selection control device is used to control described N * w optical switch and selects to realize wavelength; Described delay selection controller is used to control described w bar adjustable optic fibre delay line to realize delay selection.
3. optical code division multiple access wavelength as claimed in claim 1 or 2-time-domain two-dimensional optical orthogonal code encoder is characterized in that described adjustable optic fibre delay line comprises one 1 * 2 optical switch, m-2 2 * 2 optical switches, one 2 * 1 optical switch; By the fiber delay line serial connection, time-delay is followed successively by τ, 2 τ, 2 to a described m optical switch successively
2τ, 2
3τ ..., 2
M-2τ, m are the positive integer greater than 2.
4. optical code division multiple access wavelength-time-domain two-dimensional optical orthogonal code decoder is characterized in that, described decoder is selected wavelength-time-domain two dimension (N * M, w, λ
a, λ
c) light orthogonal code carries out the photodissociation sign indicating number, its code word district group is [(i
1, j
1), (i
2, j
2) ..., (i
l, j
l) ..., (i
w, j
w)], wherein: the wavelength sum that N comprises for sign indicating number, M cuts general number the time, and w is the code weight of each code word, λ
aBe the auto-correlation restriction of sign indicating number, λ
cCross-correlation restriction for sign indicating number; Described decoder is made up of photodissociation sign indicating number module, control circuit and Xin Lingdaili; Photodissociation sign indicating number module is controlled by control circuit, and control circuit is accepted the instruction that Xin Lingdaili sends, and realizes wavelength selection and delay selection; Xin Lingdaili links to each other with signaling network; Described photodissociation sign indicating number module is by forming with lower member:
1 * N Wave decomposing multiplexer: it is λ that the light code signal that is used for receiving from the optical code division multiple access optical-fiber network is divided into wavelength
0, λ
1..., λ
N-1Light pulse;
N * w optical switch: accept the control of control circuit, selecting wavelength according to described wavelength-time-domain two-dimensional optical orthogonal code is λ
IlLight pulse, 0≤i
l≤ N-1, l=1,2 ..., w;
W bar adjustable optic fibre delay line: accept the control of control circuit, according to second coordinate figure j of described two-dimensional optical orthogonal code code word element
l, described N * selected w of w optical switch light pulse realized different time-delay (M-j
l) τ, 0≤j
l≤ M-1;
W * N optical switch is used for and will have realized time-delay (M-j
l) light pulse of τ delivers to N * 1 wavelength division multiplexer;
N * 1 wavelength division multiplexer is used for the light pulse that described w * the N optical switch sends is realized closing ripple.
5. optical code division multiple access wavelength as claimed in claim 4-time-domain two-dimensional optical orthogonal code decoder, it is characterized in that, described control circuit comprises wavelength selection control device and delay selection controller, and described wavelength selection control device is used to control described N * w optical switch and selects to realize wavelength; Described delay selection controller is used to control described w bar adjustable optic fibre delay line to realize delay selection.
6. as claim 4 or 5 described optical code division multiple access wavelength-time-domain two-dimensional optical orthogonal code decoders, it is characterized in that described adjustable optic fibre delay line comprises one 1 * 2 optical switch, m-2 2 * 2 optical switches, one 2 * 1 optical switch; By the fiber delay line polyphone, time-delay is followed successively by τ, 2 τ, 2 to a described m optical switch successively
2τ, 2
3τ ..., 2
M-2τ, m are the positive integer greater than 2.
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| CNB2004100090610A CN1268077C (en) | 2004-04-30 | 2004-04-30 | Optical CDMA wavelength-time domain two-dimensional optical orthogonal code coder and decoder |
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| CNB2004100090610A CN1268077C (en) | 2004-04-30 | 2004-04-30 | Optical CDMA wavelength-time domain two-dimensional optical orthogonal code coder and decoder |
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| CN1268077C true CN1268077C (en) | 2006-08-02 |
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| WO2006118153A1 (en) * | 2005-04-27 | 2006-11-09 | National Institute Of Japan Science And Technology Agency | Optical analog/digital conversion method and apparatus thereof |
| ATE406008T1 (en) * | 2006-01-10 | 2008-09-15 | Alcatel Lucent | INTERCHANNEL TIME CODING METHOD FOR MULTI-CHANNEL TRANSMISSION SYSTEMS |
| CN101854221B (en) * | 2010-04-29 | 2013-04-17 | 电子科技大学 | All-optical recognition scheme for dual two-dimensional optical code optical label |
| CN102378072B (en) * | 2011-12-07 | 2013-12-25 | 东南大学 | Frequency hopping period optical coding and decoding method and optical coder decoder |
| CN104486696A (en) * | 2014-12-22 | 2015-04-01 | 东南大学 | Reconfigurable two-dimensional optical encoder and encoding method based on photoswitch and light reflector |
| CN106059703B (en) * | 2016-07-22 | 2018-06-29 | 广西师范大学 | Local side R-T unit and its decoding method based on OCDMA two dimension electric light encoding and decoding |
| CN106100784B (en) * | 2016-08-11 | 2018-09-25 | 广西师范大学 | A kind of two-dimentional OCDMA methods of sending and receiving and device of electrical domain encoding and decoding |
| WO2018076385A1 (en) | 2016-10-31 | 2018-05-03 | 华为技术有限公司 | Receiver and data reception method |
| CN108494491A (en) * | 2018-03-08 | 2018-09-04 | 广西师范大学 | A kind of electric light encoding and decoding R-T unit and decoding method |
| CN113660055B (en) * | 2021-08-06 | 2022-07-12 | 深圳大学 | One-dimensional optical coding method and code word design |
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