What problems need to be solved?

需要解决什么问题？

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What kind of business problems need to be solved?

需要解决哪些类型的业务问题？

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To improve system performance, there are many key technologies need to be solved or improved in OFDM and SC-FDE systems, where channel estimation is one of them.

为了进一步提高系统性能，OFDM和SC - FDE系统都还有很多关键技术需要进一步的解决和完善，信道估计就是其中之一。

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Through this space is a more linear path where particular puzzles need to be solved to progress to the next area.

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There are problems that need to be solved.

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Certain problems need to be solved.

CNN: ASIANOW - Asiaweek