4.36.yingyao.ps

是multiuser detection 这本书的习题解答, 很有用的书.

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%%EndProlog
%%BeginSetup
%%Feature: *Resolution 300
TeXDict begin @letter
%%EndSetup
%%Page: 1 1
bop 678 307 a Fi(Solution)20 b(to)f(Problem)f(4.36)852 357
y Fh(Yingw)o(ei)13 b(Y)m(ao)262 457 y(\(a\))18 b(If)h Fg(A)411
463 y Ff(1)449 457 y Fh(=)h Fg(A)p Fh(,)g(then)f Fg(A)694 463
y Ff(2)732 457 y Fh(m)o(ust)f(satisfy)g(the)i(follo)o(wing)c(conditions:)27
b Fg(A)1486 463 y Ff(2)1525 457 y Fe(\025)20 b Fg(A)f Fh(and)262
506 y Fg(A)293 491 y Ff(2)320 506 y Fh(+)10 b Fg(A)393 491
y Ff(2)393 517 y(2)421 506 y Fe(\000)g Fh(2)p Fg(AA)546 512
y Ff(2)564 506 y Fe(j)p Fg(\032)p Fe(j)h Fg(>)h(A)695 491 y
Ff(2)714 506 y Fh(,)h(whic)o(h)h(is)g(equiv)n(alen)o(t)f(to)793
598 y Fg(A)824 604 y Ff(2)854 598 y Fg(>)f Fh(max)n Fe(f)p
Fg(A;)7 b Fh(2)p Fg(A)p Fe(j)p Fg(\032)p Fe(jg)262 689 y Fh(\(b\))18
b(If)f Fg(A)411 695 y Ff(1)447 689 y Fh(=)i Fg(A)529 695 y
Ff(2)547 689 y Fh(,)g(then)f Fg(A)707 695 y Ff(1)743 689 y
Fh(m)o(ust)f(satisfy)g(the)i(follo)o(wing)c(conditions:)25
b Fg(A)1491 695 y Ff(1)1528 689 y Fe(\025)18 b Fg(A)g Fh(and)262
739 y(2)p Fg(A)314 724 y Ff(2)314 749 y(1)341 739 y Fe(\000)10
b Fh(2)p Fg(A)435 724 y Ff(2)435 749 y(1)453 739 y Fe(j)p Fg(\032)p
Fe(j)h Fg(>)h(A)584 724 y Ff(2)603 739 y Fh(,)h(whic)o(h)h(is)g(equiv)n(alen)
o(t)f(to)747 851 y Fg(A)778 857 y Ff(1)808 851 y Fg(>)f Fh(max)n
Fe(f)p Fg(A;)1078 823 y(A)p 1004 842 179 2 v 1004 850 a Fd(p)p
1046 850 137 2 v 36 x Fh(2)d Fe(\000)g Fh(2)p Fe(j)p Fg(\032)p
Fe(j)1188 851 y(g)262 978 y Fh(\(c\))14 b(In)f(case)i(\(a\))e(the)i(minim)n
(um)9 b(ac)o(hiev)n(able)k Fg(A)1017 963 y Ff(2)1017 988 y(1)1044
978 y Fh(+)c Fg(A)1116 963 y Ff(2)1116 988 y(2)1149 978 y Fh(is)k(max)n
Fe(f)p Fh(2)p Fg(A)1340 963 y Ff(2)1359 978 y Fg(;)7 b(A)1409
963 y Ff(2)1427 978 y Fh(\(1)h(+)h(4)p Fe(j)p Fg(\032)p Fe(j)1579
963 y Ff(2)1597 978 y Fh(\))p Fe(g)p Fh(;)k(in)262 1035 y(case)h(\(b\))g(the)
g(minim)n(um)c(ac)o(hiev)n(able)j Fg(A)904 1019 y Ff(2)904
1045 y(1)931 1035 y Fh(+)c Fg(A)1003 1019 y Ff(2)1003 1045
y(2)1035 1035 y Fh(is)14 b(max)n Fe(f)p Fh(2)p Fg(A)1227 1019
y Ff(2)1245 1035 y Fg(;)1288 1018 y Fc(A)1313 1006 y Fb(2)p
1269 1025 80 2 v 1269 1049 a Ff(1)p Fa(\000j)p Fc(\032)p Fa(j)1353
1035 y Fe(g)p Fh(.)k(W)m(e)13 b(can)h(see)h(that)262 1094 y(when)d
Fg(\032)g Fe(\024)g Fh(0)p Fg(:)p Fh(5,)e(the)i(minim)o(um)7
b(ac)o(hiev)n(able)k(v)n(alues)g(for)h(case)g(\(a\))g(and)g(\(b\))g(are)g(b)q
(oth)g(2)p Fg(A)1664 1079 y Ff(2)1682 1094 y Fh(;)262 1144
y(when)17 b Fg(\032)g(>)f Fh(0)p Fg(:)p Fh(5,)h(the)g(minim)n(um)c(ac)o(hiev)
n(able)j(v)n(alue)g(of)g(case)i(\(a\))f(is)f(smaller)g(than)h(that)262
1194 y(of)c(case)j(\(b\).)k(Hence,)15 b(it)f(ma)o(y)f(b)q(e)i(b)q(etter)h(to)
e(let)h(one)f(user)i(ha)o(v)o(e)e(single)g(user)i(SNR)e(than)262
1243 y(force)g(t)o(w)o(o)f(users)j(to)d(ha)o(v)o(e)h(same)f(p)q(o)o(w)o(er.)
967 2574 y(1)p eop
%%Trailer
end
userdict /end-hook known{end-hook}if
%%EOF