文件名称:CRACK
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Why LDPC Codes are Strong
Candidates for Next Generation
Wireless Systems
♦ Next Generation Wireless Systems typically require higher
data throughput in a given bandwidth
• High rate FEC with higher order modulation (e.g. cdma2000 EVDV,
HSDPA) is required
• Applications require high speed by default permit use of long
blocks
♦ Turbo codes tend to lose performance at high code rates due
to excessive puncturing, turbo trellis codes become rather
complex to implement for higher order modulation
-Why LDPC Codes are Strong
Candidates for Next Generation
Wireless Systems
♦ Next Generation Wireless Systems typically require higher
data throughput in a given bandwidth
• High rate FEC with higher order modulation (e.g. cdma2000 EVDV,
HSDPA) is required
• Applications require high speed by default permit use of long
blocks
♦ Turbo codes tend to lose performance at high code rates due
to excessive puncturing, turbo trellis codes become rather
complex to implement for higher order modulation
Candidates for Next Generation
Wireless Systems
♦ Next Generation Wireless Systems typically require higher
data throughput in a given bandwidth
• High rate FEC with higher order modulation (e.g. cdma2000 EVDV,
HSDPA) is required
• Applications require high speed by default permit use of long
blocks
♦ Turbo codes tend to lose performance at high code rates due
to excessive puncturing, turbo trellis codes become rather
complex to implement for higher order modulation
-Why LDPC Codes are Strong
Candidates for Next Generation
Wireless Systems
♦ Next Generation Wireless Systems typically require higher
data throughput in a given bandwidth
• High rate FEC with higher order modulation (e.g. cdma2000 EVDV,
HSDPA) is required
• Applications require high speed by default permit use of long
blocks
♦ Turbo codes tend to lose performance at high code rates due
to excessive puncturing, turbo trellis codes become rather
complex to implement for higher order modulation
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