Hi Seegull,
Charles gives advise on this very thing in all his Books.
The method I chose from the options he gives was to cover the area with 6″ of FYM or Horse Manure, the latter in my case, in late winter,and cover until sowing/planting time. This will kill off even the most hardy of weeds though not all. Every year thereafter you add a 2″ layer of Garden Compost or Manure.
I don’t think you will get perfect soil in just 12 months, more likely 4/5 years, sooner or longer depending on the soil you are starting out with in the first place.
So basically if you start with a 6″ layer of FYM you don’t need any other weed suppression.
Don.