A/L ICT Competency 8.4

Nju;rr ; p 8.4 gd;ikahf;fk; (Multiplexing) xU Fwpj;j ghijapD}lhf(Channel) xNu tpjkhd miytupiria(xg;Gik kw;Wk; vz;zpay;) nfhz;l gy juT or xypr; rkpq;iQfis gupkhw;wk; nra;fpd;wNghJ vjpu; Nehf;fg;Lk; ,lu;fisj; jtpu;;j;J mr;rkpq;iQfspid mg;ghijapD}lhf gupkhw;wk; nra;aj;jf;fjhf khw;Wk; nraw;ghNl gd;ikahf;fk; vdg;gLk;. mjhtJ 4 64kb/s rkpq;iQfis A apypUe;J Bf;F gupkhw;w Nt-k;. mjw;fhf 4 ghij Njit mit xt;nthd;Wk; Fiwe;J 2 tlq;fis nfhz;bUf;f Ntz;Lk; mjhtJ A apypUe;J B 100M Mf ,Ue;jhy; 4 X 2 X 100 = 800 Copper tlk; Njit Mdhy; ,e;j 4 ghijfisAk; xd;Wld; xd;W ,ilA+uw;w tifapy; ,izf;f KbAkhdhy; xU Nrhb tlk; NghJkhdJ. ,e;j tifahd ,izg;Ng gd;ikahf;fk; vdg;gLk;. gpd;tUk; tifahd gd;ikahf;fq;fs; fhzg;gLfpdwd. 1. mjpu;ntz; or kPbwd; gd;ikahf;fk; (Frequency Division Multiplexing – xg;Gik rkpq;iQ) 2. Neu gpupT gd;ikahf;fk; (Time Division Multiplexing – vz;zpay; rkpq;iQ) 3. Fwp gpupT gd;ikahf;fk; (Code Division Multiplexing- ,uz;L rkpq;iQfSf;FkhdJ)

1. mjpu;ntz; or kPbwd; gd;ikahf;fk; xNu miytupir mjpu;ntz;fisf; nfhz;l gy rkpq;iQfshdJ xU tlj;jpD}lhf gpuahzpf;f KbahJ. ,J Modem ,d; cjtpAld; tpj;jpahrkhd mjpu;ntz;fshf khw;wg;gl;L xU ghijapD}lhf xd;wd; gpd; xd;whf mDg;gg;Lk; ,J gpd;tUk; glk; %yk; rpj;jupf;fg;gLfpd;wJ.

4 khz 4 khz 4 khz

M o d e m

4

8

8

12

12

4

8

12

16

16

Combiner

2. Neug; gpupT gd;ikahf;fk; A, B, C vDk; rkpq;iQfshdJ xU ghijapD}lhf xU Fwpj;j Neuj;jpy; mDg;Gtjhf ,Ue;jhy; gpuahzpf;Fk; NeukhdJ mr;rkpq;iQfSf;F ,ilNa gfpu;e;spf;fg;gl;L mitfSf;fpilNa ve;j ,ilA+Wk; tuhj tz;zk; tpj;jpahrkhd Neuq;fspy; xt;nthU rkpq;iQAk; mg;ghijapD}lhf gpuahzpf;Fk;. A

A B

B C t/3

C

t/3

C

B

A

t/3

Sampler combiner 3. Fwp gpupT gd;ikahf;fk; (Code Division Multiplexing)

,J xg;Gik kw;Wk; vz;zpay; rkpq;iQfis gupkhw;Wtjw;fhd gd;ikahf;fkhFk; ,q;F xt;nthU rkpq;iQAlDk; tpj;jpahrkhd Fwpfs; ,izf;fg;gl;Nl gupkhw;wg;gLk;.

A B C

1|ILM.Irfan

De ge ner ato r

xU

A C1 B C2 C

A

C1

B

C2

C

C3

C3

A/LICT||Competency 8.4

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