Simple channel estimation techniques

In this paper, we focus on MIMO-OFDM systems that simultaneously perform channel estimation in order to combat additive noise, and multipath fading. The performance improvement is confirmed by simulations. Results show that the proposed MIMOOFDM scheme is quite robust in practical environments.

5p minhxaminhyeu3 25-06-2019 20 1   Download

Our measurements show that our strategy can be used as a way to disable the communication within the Storm botnet to a large extent. As a side effect, we are able to estimate the size of the Storm botnet, in general a hard task [25]. Our measurements are much more precise than previous measurements [12, 17]. This is because measurements previously were based on passive techniques, e.g., by observing visible network events like the number of spam mails supposedly sent via the bots.

20p giamdocamnhac 06-04-2013 58 6   Download