tim ,technical digest series [ C ] San Jose,CA ,USA : [2] [ 3] [4] [ 5 ] [ 6] [ 7] [ 8] [ 9 ] [ 10] [ 11] IEE E ,Piscataway ,NJ ,US A ,19 98 .3 0 7 . G rimes ,G ary J .PO F application in broadband network ...