Abstract: A method and an apparatus for acquiring a target frequency of a multi-path signal are disclosed. The multi-path signal includes a first path signal and a second path signal. First, the first path signal is received through a first path and the second path signal is received through a second path. Then, a target region is determined. The target region is a portion of a second cyclic prefix in the second path signal which overlaps with a first cyclic prefix in the first path signal. Afterward, the target frequency is determined based on the target region.

Abstract: A communication device comprising an input device for inputting text character-by-character from a sequence of characters, a memory device for storing a plurality of reference character sequences of characters and a prediction device for comparing individual ones of the input characters with the reference character sequences and for proposing at least one of the reference character sequences after the inputting of individual input characters of the sequence of characters to be input in the case of a corresponding comparison result. The prediction device compares the input characters with not-immediately-adjacent characters of the reference character sequences. The input device may further a number of syllables or vowels between two input characters of the sequence of characters to be input and the prediction device compares the number of input syllables or vowels with corresponding numbers of syllables or vowels of the reference character sequences.