LTE physical layer comparison to HSPA.
LTE builds on the learning of several WCDMA/HSPA Releases and covers from the start HARQ, BTS scheduling and adaptive coding and modulation (+ multiple antenna TX/RX with MIMO).
LTE eNodeB is similar to Base station of other technologies such as WCDMA, GSM etc. eNodeB Physical layer consists of Channel coding,rate matching, scrambler, mapper, layer mapping, pre-coding, resource element mapper, ofdm module.
|Multiple Access||OFDMA, SC-FDMA||WCDMA||WCDMA|
|Largest BW||20 MHz||5 MHz||5 MHz|
|Fast power control||No||Yes||No (associated DCH only)|
|Soft handover||No||Yes||No (associated DCH only)|
|BTS based scheduling||Time/Freq||Time/Code||Time/Code|
|Fast L1 HARQ||Yes||Yes||Yes|