Random access preamble receiver

A radio access node comprising:

• at least one processor;
• and
• memory comprising instructions executable by the at least one processor whereby the radio access node is operable to:
• receive a random access transmission from a wireless device;
• detect a random access preamble in the random access transmission from the wireless device, wherein detecting the random access preamble in the random access transmission from the wireless device comprises being operable to detect the random access preamble using a narrowband Inverse Fast Fourier Transform (IFFT) of the random access transmission from the wireless device;
• and
• estimate a timing parameter of the wireless device using the random access transmission from the wireless device separately from detecting the random access preamble.

A tangible, non-transitory computer-readable storage medium, having instructed stored thereon that, when executed by a processing device, cause the processing device to perform operations comprising:

• receiving a random access transmission from a wireless device;
• detecting a random access preamble in the random access transmission from the wireless device, wherein detecting the random access preamble in the random access transmission from the wireless device comprises being operable to detect the random access preamble using a narrowband Inverse Fast Fourier Transform (IFFT) of the random access transmission from the wireless device;
• and
• estimating a timing parameter of the wireless device using the random access transmission from the wireless device separately from detecting the random access preamble.