IEEE Communications Letters
IEEE Communications Letters > 2002 > 6 > 9 > 403 - 405
IEEE Communications Letters > 2002 > 6 > 11 > 503 - 505
IEEE Communications Letters > 2002 > 6 > 9 > 403 - 405
IEEE Communications Letters > 2002 > 6 > 11 > 503 - 505