Unformatted text preview: the design of the OFDMA system more complex and engineers consider this tradeoff between performance and cost when designing OFDMA systems. Currently, cellular data services are becoming increasingly popular. The multiple-access version of OFDM, i.e. OFDMA, is being considered for upcoming 3G and 4G mobile standards because of its flexibility in allocating subcarriers and other resources to users. OFDMA hit the jackpot by being considered for the downlink of the upcoming 3GPP LTE standard. Unfortunately, the high...
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- Spring '09
- WiMAX, 3GPP Long Term Evolution, Universal Mobile Telecommunications System, CDMA2000, change modulation techniques