F. FOUKALAS ET AL.

264

5. Conclusions and Future Work

In this paper, we have extended the cross-layer design

combining AMC with HARQ using RCPT codes. To this

end, a hybrid FEC/ARQ based on RCPT codes has been

assumed. In previous works, the proposed CLD was in-

troduced with uncoded modulations, convolutional and

rate-compatible convolutional coded modulations dedi-

cated to AMC schemes. In addition to that, we have im-

plemented a CLD approach using puncturing techniques

for rate compatibility purposes. The system performance

has been evaluated for type-II hybrid ARQ mechanism.

Moreover, we have illustrated comparative results of

system performance of other rate compatible codes as

convolutional and LDPC as well. In order to have a more

comprehensive view of coding and decoding schemes we

also discuss the computational complexity of each code

separately, in terms of the required number of operations

either in each iteration attempt or for each memory len-

gth. However, since turbo coding and indeed punctured

turbo codes are able to accomplish better performance

with different RSC encoders and puncturing rules name-

ly optimal encoding and puncturing [26], a future work

should be the performance evaluation of AMC and

HARQ combination implementing different encoders

and puncturing rules using RCPT-A RQ.

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