The multi pulse position amplitude modulation scheme for time-hopping multiple access impulse radio ultrawideband communication systems has been presented in this paper. Multi pulse position amplitude modulation is a hybrid modulation technique, which combines multi pulse position modulation and pulse amplitude modulation. It is shown that multi pulse position amplitude modulation significantly...

pain is one of the most important and sometimes difficult problems, that patients and physicians are encountered. it may be clinically acute or chronic, acute pain has usually definite cause and favourable response to treatment. on the other hand there are difficulties in diagnosis and management of chronic pain. peripheral and cranial nerves convey pain impulses toward central nervous system, ...