high speed OFDM packet access (LTE) (HSOPA)

High Speed OFDM Packet Access (HSOPA) is a high-speed technology based on UMTS and can be regarded as the predecessor of Long Term Evolution( LTE).

Unlike the other HSPA methods, High Speed Downlink Packet Access( HSDPA) and High Speed Uplink Packet Access( HSUPA), High Speed OFDM Packet Access (HSOPA), which was developed by Nortel Networks, uses an extremely bandwidth-efficientmodulation method, Orthogonal Frequency Division Multiplex (OFDM), and Multiple Input Multiple Output( MIMO). The efficiency of this method is two to four times higher than the WCDMA method used in HSDPA. In addition, the bandwidths of the individual channels can be freely selected between 1.25 MHz and 20 MHz, as in Long Term Evolution (LTE).

HSOPA technology also uses a multi- antenna concept with the MIMO method. Using both techniques, HSOPA achieves data rates of 100 Mbit/s in the downlink over a 20 MHz channel and 50 Mbit/s in the uplink. Data rates of 40 Mbit/s can be achieved over a 5 MHz channel. HSOPA belongs to the 4th generation( 4G) mobile communications networks.