Interference channel capacity region for randomized fixed-composition codes

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11-26-2008

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Interference channel capacity region for randomized fixed-composition codes

HPL-2008-194 Interference channel capacity region for randomized fixed-composition codes - Chang, Cheng
Keyword(s): interference channels, randomized coding, capacity region
Abstract: The random coding error exponents are studied [5], [6] for the finite alphabet interference channel (IFC) with two transmitter receiver pairs. The code words are uniform on a fixed-composition set and the decoding is optimum, as opposed to decoding based on interference cancellation, and decoding th ...
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mvalid

mvalid(2)							System Calls Manual							 mvalid(2)

NAME

       mvalid() - check memory region for validity

SYNOPSIS


   Parameters
       addr    The address of the region whose validity is to be checked.

       len     The length in bytes of the region specified by the addr parameter.

       prot    The desired access protection for the region.

DESCRIPTION

       The  function  checks the validity of a memory region.  A region is considered to be valid if accesses of the requested type are allowed to
       all addresses in the region.

       The header file defines the following access options:

	      The mapped region can be read.

	      The mapped region can be written.

	      The mapped region can be executed.

       The prot parameter can be any combination of and ORed together.

RETURN VALUES

       The function returns:

	      Success.
		     Accesses requiring the specified protection are allowed to all addresses within the specified range of addresses.

	      Failure.
		     is set to indicate the error.

ERRORS

       If the function fails, may be set to one of the following values:

       The range specified by
		      (addr, addr+len) is invalid for the process's address space, or the range specifies one or more unmapped pages,  or  one	or
		      more pages of the range disallows accesses of the specified protection.

       The	      prot parameter is invalid, or the addr parameter is not a multiple of the page size as returned by

       The range specified by
		      (addr, addr+len) is invalid for the process's address space, or the range specifies one or more unmapped pages.

AUTHOR

       was developed by HP.

SEE ALSO

       mmap(2), mprotect(2), sysconf(2).

																	 mvalid(2)

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